Crysvita
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ANNEX I 

 
SUMMARY OF PRODUCT CHARACTERISTICS 

 
 
 
 
 
 



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This medicinal product is subject to additional monitoring. This will allow quick identification of 
new safety information. Healthcare professionals are asked to report any suspected adverse reactions. 
See section 4.8 for how to report adverse reactions. 
 
 
1. NAME OF THE MEDICINAL PRODUCT  
 
CRYSVITA 10 mg solution for injection 
 
CRYSVITA 20 mg solution for injection  
 
CRYSVITA 30 mg solution for injection  
 
 
2. QUALITATIVE AND QUANTITATIVE COMPOSITION 
 
CRYSVITA 10 mg solution for injection 
 
Each vial contains 10 mg of burosumab in 1 ml solution. 
 
CRYSVITA 20 mg solution for injection  
 
Each vial contains 20 mg of burosumab in 1 ml solution. 
 
CRYSVITA 30 mg solution for injection 
 
Each vial contains 30 mg of burosumab in 1 ml solution. 
 
Burosumab is a recombinant human monoclonal IgG1 antibody for FGF23 and is produced by 
recombinant DNA technology using Chinese hamster ovary (CHO) mammalian cell culture. 
 
Excipient with known effect 
 
Each vial contains 45.91 mg sorbitol. 
 
For the full list of excipients, see section 6.1. 
 
 
3. PHARMACEUTICAL FORM 
 
Solution for injection (injection). 
 
Clear to slightly opalescent, colourless to pale brownish-yellowish solution. 
 
 
4. CLINICAL PARTICULARS 
 
4.1 Therapeutic indications 
 
CRYSVITA is indicated for the treatment of X-linked hypophosphataemia with radiographic evidence 
of bone disease in children 1 year of age and older and adolescents with growing skeletons. 
 
4.2 Posology and method of administration 
 
Treatment should be initiated by a physician experienced in the management of patients with 
metabolic bone diseases.  
 



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Posology 
 
Oral phosphate and active vitamin D analogues (e.g. calcitriol) should be discontinued 1 week prior to 
initiation of treatment. Vitamin D replacement or supplementation with inactive forms may be started 
or continued as per local guidelines under monitoring of serum calcium and phosphate. At initiation, 
fasting serum phosphate concentration should be below the reference range for age (see section 4.3).  
 
The recommended starting dose is 0.8 mg/kg of body weight given every two weeks. Doses should be 
rounded to the nearest 10 mg. The maximum dose is 90 mg. 
 
After initiation of treatment with burosumab, fasting serum phosphate should be measured every 
2 weeks for the first month of treatment, every 4 weeks for the following 2 months and thereafter as 
appropriate. Fasting serum phosphate should also be measured 4 weeks after any dose adjustment. 
If fasting serum phosphate is within the reference range for age, the same dose should be maintained. 
 
To decrease the risk for ectopic mineralisation, it is recommended that fasting serum phosphate is 
targeted in the lower end of the normal reference range for age (see section 4.4). 
 
Dose increase 
If fasting serum phosphate is below the reference range for age, the dose may be increased stepwise by 
0.4 mg/kg up to a maximum dose of 2.0 mg/kg (maximum dose of 90 mg). Fasting serum phosphate 
should be measured 4 weeks after dose adjustment. Burosumab should not be adjusted more 
frequently than every 4 weeks. 
 
Dose decrease  
If fasting serum phosphate is above the reference range for age, the next dose should be withheld and 
the fasting serum phosphate reassessed within 4 weeks. The patient must have fasting serum 
phosphate below the reference range for age to restart burosumab at half of the previous dose, 
rounding the amount as described above.  
 
Missed or late dosing  
To avoid missed doses, treatments may be administered 3 days either side of the scheduled treatment 
date. If a patient misses a dose, burosumab should be resumed as soon as possible at prescribed dose. 
 
Special populations 
 
Renal impairment 
Burosumab has not been studied in patients with renal impairment. Burosumab must not be given to 
patients with severe or end stage renal disease (see section 4.3). 
 
Paediatric population 
The safety and efficacy of burosumab in children aged less than one year have not been established. 
No data are available. 
 
Method of administration 
 
For subcutaneous use. 
 
Burosumab should be injected in the arm, abdomen, buttock or thigh. 
 
The maximum volume of medicinal product per injection site is 1.5 ml. If more than 1.5 ml is required 
on a given dosing day, the total volume of medicinal product must be split and administered at two or 
more different injection sites. Injections sites should be rotated and carefully monitored for signs of 
potential reactions (see section 4.4).  
 
For handling of burosumab before administration, see section 6.6. 
 



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4.3 Contraindications 
 
Hypersensitivity to the active substance or to any of the excipients listed in section 6.1.  
 
Concurrent administration with oral phosphate, active vitamin D analogues (see section 4.5). 
 
Fasting serum phosphate above the normal range for age due to the risk of hyperphosphatemia (see 
section 4.4). 
 
Patients with severe renal impairment or end stage renal disease. 
 
4.4 Special warnings and precautions for use 
 
Ectopic mineralisation 
 
Ectopic mineralisation, as manifested by nephrocalcinosis, has been observed in patients with XLH 
treated with oral phosphate and active vitamin D analogues; these medicinal products should be 
stopped at least 1 week prior to initiating burosumab treatment (see section 4.2). 
 
Monitoring for signs and symptoms of nephrocalcinosis, e.g. by renal ultrasonography, is 
recommended at the start of treatment and every 6 months for the first 12 months of treatment, and 
annually thereafter. Monitoring of plasma alkaline phosphatases, calcium, parathyroid hormone (PTH) 
and creatinine is recommended every 6 months (every 3 months for children 1- 2 years) or as 
indicated. 
Monitoring of urine calcium and phosphate is suggested every 3 months. 
 
Hyperphosphataemia 
 
Patient’s fasting serum phosphate level should be monitored due to the risk of hyperphosphatemia. To 
decrease the risk for ectopic mineralisation, it is recommended that fasting serum phosphate is targeted 
in the lower end of the normal reference range for age. Dose interruption and/or dose reduction may be 
required (see section 4.2). Periodic measurement of post prandial serum phosphate is advised. 
 
Serum parathyroid hormone 
 
Increases in serum parathyroid hormone have been observed in some XLH patients during treatment 
with burosumab. Periodic measurement of serum parathyroid hormone is advised. 
 
Injection site reactions 
 
Administration of burosumab may result in local injection site reactions. Administration should be 
interrupted in any patient experiencing severe injection site reactions (see section 4.8) and appropriate 
medical therapy administered. 
 
Hypersensitivity 
 
Burosumab must be discontinued if serious hypersensitivity reactions occur and appropriate medical 
treatment should be initiated. 
 
Excipient with known effect 
 
This medicine contains 45.91 mg of sorbitol in each vial which is equivalent to 45.91 mg/ml.  
 



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4.5 Interaction with other medicinal products and other forms of interaction 
 
Concurrent administration of burosumab with oral phosphate and active vitamin D analogues is 
contraindicated as it may cause an increased risk of hyperphosphatemia and hypercalcaemia (see 
section 4.3). 
 
Caution should be exercised when combining burosumab with calcimimetic medicinal products (i.e. 
agents that mimic the effect of calcium on tissues by activating the calcium receptor). 
Co-administration of these medicinal products has not been studied in clinical trials and could 
potentially exacerbate hypocalcaemia. 
 
4.6 Fertility, pregnancy and lactation 
 
Pregnancy 
 
There are no or limited amount of data from the use of burosumab in pregnant women. 
 
Studies in animals have shown reproductive toxicity (see section 5.3).  
 
CRYSVITA is not recommended during pregnancy and in women of childbearing potential not using 
contraception.  
  
Breast-feeding 
 
It is unknown whether burosumab/metabolites are excreted in human milk.  
 
A risk to newborns/infants cannot be excluded. 
 
A decision must be made whether to discontinue breast-feeding or to discontinue/abstain from 
CRYSVITA therapy taking into account the benefit of breast feeding for the child and the benefit of 
therapy for the woman. 
 
Fertility 
 
Studies in animals have shown effects on male reproductive organs (see section 5.3). There are no 
clinical data available on the effect of burosumab on human fertility. No specific fertility studies in 
animals with burosumab were conducted. 
 
4.7 Effects on ability to drive and use machines 
 
Burosumab may have a minor influence on the ability to drive and use machines. Dizziness may occur 
following administration of burosumab. 
 
4.8 Undesirable effects 
 
Summary of the safety profile 
 
The most common (>10%) adverse drug reactions reported in paediatric patients treated for up to 64 
weeks during clinical trials were: injection site reactions (56%), cough (56%), headache (50%), 
pyrexia (43%), pain in extremity (40%), vomiting (39%), tooth abscess (35%), vitamin D decreased 
(32%), diarrhoea (25%), rash (24%), nausea (15%), constipation (11%), dental caries (11%) and 
myalgia (11%).  
(See section 4.4 and ‘Description of selected adverse reactions’ below).  
 



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Tabulated list of adverse reactions 
 
Table 1 gives the adverse reactions observed from clinical trials. The adverse reactions are presented 
by system organ class and frequency categories, defined using the following convention: very 
common (≥1/10); common (≥1/100 to <1/10); uncommon (≥1/1000 to <1/100); rare (≥1/10,000 to 
<1/1000); very rare (<1/10,000), not known (cannot be estimated from the available data). Within each 
frequency grouping, undesirable effects are presented in order of decreasing seriousness. 
 
Table 1: Adverse reactions reported in paediatric patients with XLH based on clinical 
studies UX023-CL201, 205 and 301 (N=94) 
 

MedDRA System Organ Class Frequency category Adverse reaction 
Infections and infestations Very common Tooth abscess1 
Respiratory, thoracic and 
mediastinal disorders Very common Cough

2 

Nervous system disorder Very common Headache Common  Dizziness3 

Gastrointestinal Disorders Very common 

Vomiting 
Nausea 

Diarrhoea 
Constipation 
Dental Caries 

Skin and subcutaneous tissue 
disorder Very common Rash

4 

Musculoskeletal and connective 
tissue disorders Very common 

Myalgia  
Pain in extremity 

General disorders and 
administration site conditions Very common 

Injection site reaction5 
Pyrexia 

Investigations Very common Vitamin D decreased6 
 

1Tooth abscess includes: Tooth abscess, Tooth infection and Toothache 
2Cough includes: Cough, and Productive cough 
3Dizziness includes: Dizziness, and Dizziness exertional 
4Rash includes: Rash, Rash erythematous, Rash generalised, Rash pruritic, Rash maculo-papular, and Rash pustular  
5Injection site reaction includes: Injection site reaction, Injection site erythema, Injection site pruritus, Injection site swelling, 
Injection site pain, Injection site rash, Injection site bruising, Injection site discolouration, Injection site discomfort, Injection 
site haematoma, Injection site haemorrhage, Injection site induration, Injection site macule, and Injection site urticaria 
6Vitamin D decreased includes: Vitamin D deficiency, Blood 25-hydroxycholecalciferol decreased, and Vitamin D decreased 
 
 
Description of selected adverse reactions 
 
Injection site reactions 
Local reactions (e.g. injection site urticaria, erythema, rash, swelling, bruising, pain, pruritus, and 
haematoma) have occurred at the site of injection. In the paediatric studies, approximately 56% of the 
patients had an injection site reaction. The injection site reactions were generally mild in severity, 
occurred within 1 day of medicinal product administration, lasted approximately 1 to 3 days, required 
no treatment, and resolved in almost all instances. 
 
Hypersensitivity   
Hypersensitivity reactions (including: injection site rash, rash, urticaria, swelling face, dermatitis) 
were reported in 18% of patients. All reported reactions were mild or moderate in severity. 
 
 
 
 



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Immunogenicity  
Anti-drug antibodies (ADA) have been detected in a small percentage of patients receiving burosumab 
who had also tested positive for ADA prior to dosing; no adverse events or loss of efficacy was 
associated with these findings.  
 
Vitamin D Decreased 
Reduced serum 25 hydroxy-vitamin D has been observed following initiation of burosumab treatment 
in approximately 8% of patients, possibly due to increased conversion to activated 1,25 dihydroxy-
vitamin D.  Supplementation with inactive Vitamin D was successful in restoring plasma levels to 
normal.  
 
Reporting of suspected adverse reactions 
 
Reporting suspected adverse reactions after authorisation of the medicinal product is important. 
It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare 
professionals are asked to report any suspected adverse reactions via the national reporting system 
listed in Appendix V. 
 
4.9 Overdose 
 
There is no experience with overdose of burosumab. Burosumab has been administered in paediatric 
clinical trials without dose limiting toxicity using doses up to 2.0 mg/kg body weight with a maximal 
dose of 90 mg every two weeks. In adult clinical trials no dose limiting toxicity has been observed 
using doses up to 1.0 mg/kg or a maximal total dose of 128 mg every 4 weeks. 
 
Management 
 
In case of overdose, it is recommended to stop burosumab and to monitor biochemical response. 
 
 
5. PHARMACOLOGICAL PROPERTIES 
 
5.1 Pharmacodynamic properties 
 
Pharmacotherapeutic group: Drugs for the treatment of bone diseases, other drugs affecting bone 
structure and mineralisation, ATC code: M05BX05. 
 
Mechanism of action 
 
Burosumab is a recombinant human monoclonal antibody (IgG1) that binds to and inhibits the activity 
of fibroblast growth factor 23 (FGF23). By inhibiting FGF23, burosumab increases tubular 
reabsorption of phosphate from the kidney and increases serum concentration of 
1,25 dihydroxy-Vitamin D. 
 
Clinical efficacy and safety 
 
Study CL301 
In paediatric study CL301 61 patients aged 1 to 12 years (56% female; 44% male, Age at first dose, 
mean (SD): 6.3 (3.31) years) were randomised to burosumab (n=29) or active control (n=32; oral 
phosphate and active vitamin D). At entry to the study all patients had to have had a minimum of 6 
months treatment of oral phosphate and active vitamin D. All patients had radiographic evidence of 
bone disease due to XLH (Rickets severity score ≥2).  Burosumab was started at a dose of 0.8 mg/kg 
every 2 weeks and increased to 1.2 mg/kg if there was inadequate response, as measured by fasting 
serum phosphate.  Those patients randomised to active control group received multiple daily doses of 
oral phosphate and active vitamin D.    

http://www.ema.europa.eu/docs/en_GB/document_library/Template_or_form/2013/03/WC500139752.doc


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The primary efficacy endpoint was the change in severity of rickets at Week 40, as assessed by the 
RGI-C (Radiographic Global Impression of change) score, compared between the burosumab and 
active control groups.   
 
The RGI-C is a relative rating scale that compares a patient’s rickets before and after treatment 
utilising a 7-point ordinal scale to evaluate change in the same abnormalities rated in the RSS (as 
described below). Scores range from -3 (indicating severe worsening of rickets) to +3 (indicating 
complete healing of rickets).  
 
The severity of paediatric rickets was measured using the RSS, a radiographic scoring method based 
on the degree of metaphyseal fraying, concavity, and the proportion of the growth plate affected. In 
the UX023-CL301 study, the RSS was scored using a predefined scale looking at specific 
abnormalities in the wrists and knees.  
 
All patients completed at least 64 weeks of randomised treatment, no patients had dose reductions and 
8 (28%) of burosumab-treated patients received dose escalations to 1.2 mg/kg. 
 
Primary Efficacy Results 
Greater healing of rickets at Week 40 was seen with burosumab treatment compared to active control 
and this effect was maintained at week 64, as shown in Figure 1. 
 
Figure 1: RGI-C Global Score (Mean ± SE) – Primary Efficacy Endpoint at Week 40 and 
64 (Full Analysis Set) 
 

 
 
 
  



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Secondary Efficacy Results 
Key Secondary efficacy endpoint results are presented in Table 2.   
 
Table 2 Secondary Efficacy Endpoint Results  
 

Endpoint Week Active Control 
LS Mean (SE) 

Burosumab 
LS Mean (SE) 

 Difference 
(burosumab – 
active control) 

Lower Limb 
Deformity; assessed 
by RGI-C 
 (GEE model) 

40 +0.22 (0.080) +0.62 (0.153) +0.40 [95% CI: 
0.07, 0.72] p = 
0.0162 

64 +0.29 (0.119)   +1.25 (0.170) +0.97 [95% 
CI:+0.57, +1.37] 
p <0.0001  

Height; Z-score  

Baseline -2.05 (0.87) -2.32 (1.17)  
40 a +0.03 (0.031) +0.16 (0.052) +0.12 [95% CI: 

0.01, 0.24] p  = 
0.0408  

64 b +0.02 (0.035) +0.17 (0.066) +0.14 [95% CI: 
0.00, 0.29] p  = 
0.0490  

Rickets severity, RSS 
total Score  

Baseline 3.19 (1.141) 3.17 (0.975)  
40 a -0.72 (0.162) -2.08 (0.104) -1.34 [95% CI -

1.74, -0.94] 
p < 0.0001  

64 b -1.01 (0.151) -2.23 (0.117) -1.21 [95% CI: -
1.59, -0.83]  
p < 0.0001 

Serum ALP (U/L) 

Baseline 523 (154) 511 (125)  
40 a 489 (189) 381 (99) -97 [95% CI: -

138, -56]  
p < 0.0001 

64 b 495 (182) 337 (86) -147 [95% CI: -
192, -102]  
p < 0.0001 

Six Minute Walk Test 
(m)  
 

Baseline 450 (106) 385 (86)  
40 a +4 (14) +47 (16) +43 [95% CI:-

0.3, 87]; p = 
0.0514 

64 b +29 (17) +75 (13) +46 [95% CI: 2, 
89]; p = 0.0399 

a: the change from Baseline to Week 40 from ANCOVA model. 
b: the change from Baseline to Week 64 from GEE Model. 
 
 
 
  



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Serum Phosphate 
At each study visit at which serum phosphate was assessed in both groups, changes in serum 
phosphate from Baseline were larger in the burosumab group compared with the active control group 
(p < 0.0001; GEE model) (Figure 2). 
 
 
Figure 2: Serum Phosphate Concentration and Change from Baseline (mg/dL) 
(Mean ± SE) by Treatment Group (PD Analysis Set) 
Note: Dashed line in figure indicates the lower limit of the serum phosphate reference range, 3.2 mg/dL (1.03 mmol/L) 
 
 

 
 
 
Study UX023-CL201 
In paediatric Study UX023-CL201, 52 paediatric patients aged 5 to 12 years (mean 8.5 years; SD 1.87) 
with XLH were treated for 64 weeks. Nearly all patients had radiographic evidence of rickets at 
baseline and had received prior oral phosphate and vitamin D analogues for a mean (SD) duration of 
7 (2.4) years. This conventional therapy was discontinued 2-4 weeks prior to burosumab initiation. 
The burosumab dose was adjusted to target a fasting serum phosphate concentration of 3.50 to 5.02 
mg/dL (1.13 to 1.62 mmol/L). Twenty six of 52 patients received burosumab every 4 weeks (Q4W). 
Twenty six of 52 patients received burosumab every two weeks (Q2W) at an average dose (min, max) 
of 0.73 (0.3, 1.5), 0.98 (0.4, 2.0) and 1.04 (0.4, 2.0) mg/kg at weeks 16, 40 and 60 respectively, and up 
to a maximum dose of 2.0 mg/kg.  
 
Burosumab increased serum phosphate concentration and increased TmP/GFR. In the group that 
received burosumab every 2 weeks, mean (SD) serum phosphate concentration increased from 2.38 
(0.405) mg/dL (0.77 (0.131) mmol/L) at baseline), to 3.3 (0.396) mg/dL (1.07 (0.128) mmol/L) at 
Week 40 and was maintained to Week 64 at 3.35 (0.445) mg/dL (1.08 (0.144) mmol/L). 
 
Alkaline phosphatase activity 
Mean (SD) serum total alkaline phosphatase activity was 459 (105) U/L at baseline and decreased to 
369 (76) U/L at Week 64 (-19.6%, p < 0.0001).  



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Bone-derived serum alkaline phosphatase content was 165 (52) μg/L [mean (SD)] at Baseline and 
115 (31) μg/L at Week 64 (mean change: -28.5%). 
 
The severity of paediatric rickets in Study UX023-CL201 was measured using the RSS, as described 
above. In Study UX023-CL201, the RSS was scored using a predefined scale looking at specific 
abnormalities in the wrists and knees.As a complement to the RSS assessment, the RGI-C rating scale 
was used. Results are summarised in Table 3.  
 
Table 3: Rickets Response in Children 5-12 years receiving Burosumab in Study UX023-CL201 
 

Endpoint 
Duration of 
Burosumab 

(week) 

 
Effect Size  

Q2W (N=26) Q4W (N=26) 
RSS Total Score  
Baseline Mean (SD) 
LS Mean change (SE) 
from baseline in total 
scorea (reduced RSS score 
indicates improvement in 
rickets severity) 

   
 

 40 
1.92 (1.2) 

-1.06 (0.1)   (p<0.0001) 
1.67 (1.0) 

-0.73 (0.1)   (p<0.0001) 
 

 64 -1.00 (0.1)  (p<0.0001) -0.84 (0.1)  (p<0.0001) 

RGI-C Global Score 
LS Mean score (SE)a 
(positive indicates 
healing) 

 
40  

 
64 

 

 
+1.66 (0.1) (p<0.0001) 

 
+1.56 (0.1) (p<0.0001) 

 

 
+1.47 (0.1) (p<0.0001) 

 
+1.58 (0.1) (p<0.0001) 

 
a) The estimates of LS means and p-values are from the generalized estimation equation model accounting for 

baseline RSS, visits and regimen and its interaction. 
 
 
Study UX023-CL205 
In paediatric Study UX023-CL205, burosumab was evaluated in 13 XLH patients, aged 1 to 
4 years (mean 2.9 years; SD 1.1) for 40 weeks. All patients had radiographic evidence of rickets at 
baseline and twelve patients had received oral phosphate and vitamin D analogues for a mean (SD) 
duration of 16.7 (14.4) months. This conventional therapy was discontinued 2-6 weeks prior 
burosumab initiation. Patients received burosumab at a dose of 0.8 mg/kg every two weeks.  
 
In Study UX023-CL205, mean (SD) fasting serum phosphate concentration increased from 2.51 
(0.284) mg/dL (0.81 (0.092) mmol/L) at baseline to 3.47 (0.485) mg/dL (1.12 (0.158) mmol/L) at 
Week 40.  
 
Serum alkaline phosphatase activity 
Mean (SD) serum total alkaline phosphatase activity was 549 (193.8) U/L at baseline and decreased to 
335 (87.6) U/L at Week 40 (mean change: -36.3%). 
 
Rickets Severity Score (RSS) 
After 40 weeks of treatment with burosumab, mean total RSS improved from 2.92 (1.367) at baseline 
to 1.19 (0.522), corresponding to a change from baseline in LS mean (SE) change of -1.73 (0.132) 
(p<0.0001). 
 
Radiographic Global Impression of Change (RGI-C)  
After 40 weeks of treatment with burosumab, the LS mean (SE) RGI-C Global score was +2.33 (0.08) 
in all 13 patients (p < 0.0001) demonstrating healing of rickets. All 13 patients were considered RGI-C 
responders as defined by RGI-C global score ≥ +2.0.  
 



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The European Medicines Agency has deferred the obligation to submit the results of studies with 
CRYSVITA in one or more subsets of the paediatric population in treatment of X-linked 
hypophosphataemia. See 4.2 for information on paediatric use. 
 
This medicinal product has been authorised under a so-called ‘conditional approval’ scheme. This 
means that further evidence on this medicinal product is awaited. 
The European Medicines Agency will review new information on this medicinal product at least every 
year and this SmPC will be updated as necessary. 
 
5.2 Pharmacokinetic properties 
 
Absorption 
 
Burosumab absorption from subcutaneous injection sites to blood circulation is nearly complete. 
Following subcutaneous administration, the time to reach maximum serum concentrations (Tmax) of 
burosumab is approximately 5-10 days. The peak serum concentration (Cmax) and area under the 
concentration-time curve (AUC) of serum burosumab is dose proportional over the dose range of 
0.1-2.0 mg/kg. 
 
Distribution 
 
In XLH patients, the observed volume of distribution of burosumab approximates the volume of 
plasma, suggesting limited extravascular distribution. 
 
Biotransformation 
 
Burosumab is composed solely of amino acids and carbohydrates as a native immunoglobulin and is 
unlikely to be eliminated via hepatic metabolic mechanisms. Its metabolism and elimination are 
expected to follow the immunoglobulin clearance pathways, resulting in degradation to small peptides 
and individual amino acids.  
 
Elimination 
 
Due to its molecular size, burosumab is not expected to be directly excreted. The clearance of 
burosumab is dependent on body weight and estimated to be 0.290 L/day and 0.136 L/day in a typical 
adult (70 kg) and paediatric (30 kg) XLH patient, respectively, with corresponding disposition half-life 
(t1/2) in the serum of approximately 19 days. Following multiple dose administration to paediatric 
subjects, observed serum trough concentrations reach a plateau by 8 weeks after initiation of 
treatment.  
 
Linearity/non-linearity 
 
Burosumab displays time-invariant pharmacokinetics that is linear to dose over the subcutaneous dose 
range of 0.1 to 2.0 mg/kg. 
 
Pharmacokinetic/pharmacodynamic relationship(s) 
 
With the subcutaneous route of administration, a direct PK-PD relationship between serum burosumab 
concentrations and increases in serum phosphate concentration is observed and well described by an 
Emax/EC50 model. Serum burosumab and phosphate concentrations, as well as TmP/GFR, increased 
and decreased in parallel and reached maximum levels at approximately the same time point after each 
dose, supporting a direct PK-PD relationship. The AUC for the change from baseline in serum 
phosphate, TmP/GFR and 1,25(OH)2D increased linearly with increasing burosumab AUC. 
 



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Paediatric PK/PD 
 
No significant difference has been observed in paediatric patient pharmacokinetics or 
pharmacodynamics as compared with PK/PD in the adult population. Burosumab clearance and 
volume of distribution are body weight dependent. 
 
5.3 Preclinical safety data 
 
Adverse reactions in non-clinical studies with normal animals were observed at exposures which 
resulted in serum phosphate concentration greater than normal limits. These effects were consistent 
with an exaggerated response to the inhibition of normal FGF23 levels resulting in a supraphysiologic 
increase in serum phosphate beyond the upper limit of normal. 
 
Studies in rabbits and adult and juvenile cynomolgus monkeys demonstrated dose-dependent 
elevations of serum phosphate and 1,25 (OH)2D confirming the pharmacologic actions of burosumab 
in these species. Ectopic mineralisation of multiple tissues and organs (e.g. kidney, heart, lung, and 
aorta), and associated secondary consequences (e.g. nephrocalcinosis) in some cases, due to 
hyperphosphataemia, was observed in normal animals at doses of burosumab that resulted in serum 
phosphate concentrations in animals greater than approximately 8 mg/dL (2.6 mmol/L). In a murine 
model of XLH, a significant reduction in the incidence of ectopic mineralisation was observed at 
equivalent levels of serum phosphate, suggesting that the risk of mineralisation is less in the presence 
of excess FGF23. 
 
Bone effects seen in adult and juvenile monkeys included changes in bone metabolism markers, 
increases in thickness and density of cortical bone, increased density of total bone and thickening of 
long bone. These changes were a consequence of higher than normal serum phosphate levels, which 
accelerated bone turnover and also led to periosteal hyperostosis and a decrease in bone strength in 
adult animals, but not in juvenile animals at the doses tested. Burosumab did not promote abnormal 
bone development, as no changes in femur length or bone strength were noted in juvenile animals. 
Bone changes were consistent with the pharmacology of burosumab and the role of phosphate in bone 
mineralization, metabolism and turnover. 
 
In repeat-dose toxicology studies of up to 40 weeks duration in cynomolgus monkeys, mineralisation 
of the rete testis/seminiferous tubules was observed in male monkeys; however, no changes were 
observed in semen analysis. No adverse effects on female reproductive organs were observed in these 
studies. 
 
In the reproductive and developmental toxicology study performed in pregnant cynomolgus monkeys, 
moderate mineralisation of the placenta was seen in pregnant animals given 30 mg/kg of burosumab 
and occurred in animals with peak serum phosphate concentration greater than approximately 8 mg/dL 
(2.6 mmol/L). Shortening of the gestation period and associated increased incidence of premature 
births were observed in pregnant monkeys at doses of ≥ 0.3 mg/kg which corresponded to burosumab 
exposures that are ≥0.875- to 1.39-fold anticipated clinical levels. Burosumab was detected in serum 
from fetuses indicating that burosumab was transported across the placenta to the fetus. There was no 
evidence of teratogenic effects. Ectopic mineralisation was not observed in foetuses or offspring and 
burosumab did not affect pre- and postnatal growth including survivability of the offspring. 
 
In preclinical studies, ectopic mineralisation has been observed in normal animals, most frequently in 
the kidney, given burosumab at doses that resulted in serum phosphate concentrations greater than 8 
mg/dL (2.6 mmol/L). Neither new or clinically meaningful worsening of nephrocalcinosis nor ectopic 
mineralisation have been observed in clinical trials of patients with XLH treated with burosumab to 
achieve normal serum phosphate levels.  
 
 
6. PHARMACEUTICAL PARTICULARS 
 
6.1 List of excipients 



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L-histidine 
D-sorbitol E420 
Polysorbate 80 
L-methionine  
Hydrochloric acid, 10% (for pH adjustment) 
Water for injections 
 
6.2 Incompatibilities 
 
In the absence of compatibility studies, this medicinal product must not be mixed with other medicinal 
products. 
 
6.3 Shelf life 
 
3 years. 
 
6.4 Special precautions for storage 
 
Store in a refrigerator (2°C to 8°C). Do not freeze. 
 
Store in the original package in order to protect from light.  
 
6.5 Nature and contents of container 
 
Clear glass vial with butyl rubber stopper, and aluminium seal. 
 
Pack size of one vial. 
 
6.6 Special precautions for disposal and other handling 
 
Each vial is for single use only.  
 
Do not shake the vial before use. 
 
Burosumab should be administered using aseptic technique and sterile disposable syringes and 
injection needles.  
 
Any unused medicinal product or waste material should be disposed of in accordance with local 
requirements. 
 
 
7. MARKETING AUTHORISATION HOLDER 
 
Kyowa Kirin Holdings B.V. 
Bloemlaan 2 
2132NP Hoofddorp 
The Netherlands  
+31 (0) 237200822  
medinfo@kyowakirin.com 
 
 
8. MARKETING AUTHORISATION NUMBER(S) 
 
EU/1/17/1262/001 
EU/1/17/1262/002 
EU/1/17/1262/003 

mailto:medinfo@kyowakirin.com


15 

 
 
9. DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION 
 
Date of first authorisation: 19 February 2018 
Date of latest renewal:  21 February 2020 
 
 
10. DATE OF REVISION OF THE TEXT 
 
Detailed information on this medicinal product is available on the website of the European Medicines 
Agency http://www.ema.europa.eu. 
  

http://www.ema.europa.eu/


16 

 
 
 
 
 
 

ANNEX II 

 

A. MANUFACTURER(S) OF THE BIOLOGICAL ACTIVE SUBSTANCE(S) AND 
MANUFACTURER(S) RESPONSIBLE FOR BATCH RELEASE  

B. CONDITIONS OR RESTRICTIONS REGARDING SUPPLY AND USE 

 
C. OTHER CONDITIONS AND REQUIREMENTS OF THE MARKETING 

AUTHORISATION 
 
D. CONDITIONS OR RESTRICTIONS WITH REGARD TO THE SAFE AND 

EFFECTIVE USE OF THE MEDICINAL PRODUCT 
 
E. SPECIFIC OBLIGATION TO COMPLETE POST-AUTHORISATION MEASURES 

FOR THE CONDITIONAL MARKETING AUTHORISATION 
 

 



17 

A. MANUFACTURER(S) OF THE BIOLOGICAL ACTIVE SUBSTANCE(S) AND 
MANUFACTURER(S) RESPONSIBLE FOR BATCH RELEASE 

 
Name and address of the manufacturer(s) of the biological active substance(s)  

Kyowa Kirin Co., Ltd. 
Takasaki Plant 
100-1 Hagiwara-machi 
Takasaki 
370-0013 Gunma 
JAPAN 
 
Name and address of the manufacturer(s) responsible for batch release 

Piramal Healthcare UK Limited 
Whalton Road 
Northumberland 
Morpeth 
NE61 3YA 
UNITED KINGDOM 
 
allphamed PHARBIL Arzneimittel GmbH 
Hildebrandstr. 10-12 
37081 Göttingen 
GERMANY 
 
The printed package leaflet of the medicinal product must state the name and address of the 
manufacturer responsible for the release of the concerned batch. 

 
B. CONDITIONS OR RESTRICTIONS REGARDING SUPPLY AND USE 
 

Medicinal product subject to restricted medical prescription (see Annex I: Summary of Product 
Characteristics, section 4.2). 

 

C. OTHER CONDITIONS AND REQUIREMENTS OF THE MARKETING 
AUTHORISATION  

 

• Periodic safety update reports  
 

The requirements for submission of periodic safety update reports for this medicinal product are set 
out in the list of Union reference dates (EURD list) provided for under Article 107c(7) of Directive 
2001/83/EC and any subsequent updates published on the European medicines web-portal. 

The marketing authorisation holder shall submit the first periodic safety update report for this 
product within 6 months following authorisation. 

 

D. CONDITIONS OR RESTRICTIONS WITH REGARD TO THE SAFE AND 
EFFECTIVE USE OF THE MEDICINAL PRODUCT 

 

• Risk Management Plan (RMP) 
 

The MAH shall perform the required pharmacovigilance activities and interventions detailed in the 



18 

agreed RMP presented in Module 1.8.2 of the marketing authorisation and any agreed subsequent 
updates of the RMP. 

An updated RMP should be submitted: 

• At the request of the European Medicines Agency; 

• Whenever the risk management system is modified, especially as the result of new 
information being received that may lead to a significant change to the benefit/risk profile or 
as the result of an important (pharmacovigilance or risk minimisation) milestone being 
reached.  

 

E. SPECIFIC OBLIGATION TO COMPLETE POST-AUTHORISATION MEASURES 
FOR THE CONDITIONAL MARKETING AUTHORISATION 

 
This being a conditional marketing authorisation and pursuant to Article 14(7) of Regulation (EC) 
No 726/2004, the MAH shall complete, within the stated timeframe, the following measures: 

Description Due date 

UX023-CL205 

In order to confirm the efficacy and safety of Crysvita in the treatment of X-linked 
Hypophosphataemia (XLH) in children between 1 and 4 years old, the MAH should submit the 
updated results of study UX023-CL205, an open-label, phase 2 study to assess the safety, 
pharmacodynamics, and efficacy of KRN23 in paediatric patients with XLH. 

 
May 2020 

 

 

 
 
 
  



19 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
ANNEX III 

 
LABELLING AND PACKAGE LEAFLET 

  



20 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
A. LABELLING 

  



21 

PARTICULARS TO APPEAR ON THE OUTER PACKAGING 
 
10 mg CARTON 
 
 
1. NAME OF THE MEDICINAL PRODUCT 
 
CRYSVITA 10 mg solution for injection 
burosumab 
 
 
2. STATEMENT OF ACTIVE SUBSTANCE(S) 
 
Each vial contains 10 mg burosumab in 1 ml of solution. 
 
 
3. LIST OF EXCIPIENTS 
 
Excipients: L-histidine, D- sorbitol E420, polysorbate 80, L-methionine, hydrochloric acid, 10%, and 
water for injections. 
See leaflet for further information. 
 
 
4. PHARMACEUTICAL FORM AND CONTENTS 
 
Solution for injection 
1 vial 
 
 
5. METHOD AND ROUTE(S) OF ADMINISTRATION 
 
Read the package leaflet before use. 
Subcutaneous use. 
For single use only. 
Do not shake before use. 
 
 
6. SPECIAL WARNING THAT THE MEDICINAL PRODUCT MUST BE STORED OUT 

OF THE SIGHT AND REACH OF CHILDREN 
 
Keep out of the sight and reach of children. 
 
 
7. OTHER SPECIAL WARNING(S), IF NECESSARY 
 
 
8. EXPIRY DATE 
 
EXP 
 
 



22 

9. SPECIAL STORAGE CONDITIONS 
 
Store in a refrigerator. 
Do not freeze. 
Store in the original package in order to protect from light. 
 
 
10. SPECIAL PRECAUTIONS FOR DISPOSAL OF UNUSED MEDICINAL PRODUCTS 

OR WASTE MATERIALS DERIVED FROM SUCH MEDICINAL PRODUCTS, IF 
APPROPRIATE 

 
 
11. NAME AND ADDRESS OF THE MARKETING AUTHORISATION HOLDER 
 
Kyowa Kirin Holdings B.V. 
Bloemlaan 2 
2132NP Hoofddorp 
The Netherlands  
 
 
12. MARKETING AUTHORISATION NUMBER(S)  
 
EU/1/17/1262/001 
 
 
13. BATCH NUMBER 
 
Lot 
 
 
14. GENERAL CLASSIFICATION FOR SUPPLY 
 
 
15. INSTRUCTIONS ON USE 
 
 
16. INFORMATION IN BRAILLE 
 
Justification for not including Braille accepted. 
 
 
17. UNIQUE IDENTIFIER – 2D BARCODE 
 
2D barcode carrying the unique identifier included. 
 
 
18. UNIQUE IDENTIFIER - HUMAN READABLE DATA 
 
PC: 
SN: 
NN: 
 



23 

MINIMUM PARTICULARS TO APPEAR ON SMALL IMMEDIATE PACKAGING UNITS 
 
10 mg VIAL  
 
 
1. NAME OF THE MEDICINAL PRODUCT AND ROUTE(S) OF ADMINISTRATION 
 
CRYSVITA 10 mg injection 
burosumab 
SC 
 
 
2. METHOD OF ADMINISTRATION 
 
 
3. EXPIRY DATE 
 
EXP 
 
 
4. BATCH NUMBER 
 
Lot 
 
 
5. CONTENTS BY WEIGHT, BY VOLUME OR BY UNIT 
 
1 ml 
 
 
6. OTHER 
 
  



24 

PARTICULARS TO APPEAR ON THE OUTER PACKAGING 
 
20 mg CARTON 
 
 
1. NAME OF THE MEDICINAL PRODUCT 
 
CRYSVITA 20 mg solution for injection 
burosumab 
 
 
2. STATEMENT OF ACTIVE SUBSTANCE(S) 
 
Each vial contains 20 mg burosumab in 1 ml of solution. 
 
 
3. LIST OF EXCIPIENTS 
 
Excipients: L-histidine, D- sorbitol E420, polysorbate 80, L-methionine, hydrochloric acid, 10%, and 
water for injections. 
See leaflet for further information. 
 
 
4. PHARMACEUTICAL FORM AND CONTENTS 
 
Solution for injection 
1 vial 
 
 
5. METHOD AND ROUTE(S) OF ADMINISTRATION 
 
Read the package leaflet before use. 
Subcutaneous use. 
For single use only. 
Do not shake before use. 
 
 
6. SPECIAL WARNING THAT THE MEDICINAL PRODUCT MUST BE STORED OUT 

OF THE SIGHT AND REACH OF CHILDREN 
 
Keep out of the sight and reach of children. 
 
 
7. OTHER SPECIAL WARNING(S), IF NECESSARY 
 
 
8. EXPIRY DATE 
 
EXP 
 
 



25 

9. SPECIAL STORAGE CONDITIONS 
 
Store in a refrigerator. 
Do not freeze. 
Store in the original package in order to protect from light. 
 
 
10. SPECIAL PRECAUTIONS FOR DISPOSAL OF UNUSED MEDICINAL PRODUCTS 

OR WASTE MATERIALS DERIVED FROM SUCH MEDICINAL PRODUCTS, IF 
APPROPRIATE 

 
 
11. NAME AND ADDRESS OF THE MARKETING AUTHORISATION HOLDER 
 
Kyowa Kirin Holdings B.V. 
Bloemlaan 2 
2132NP Hoofddorp 
The Netherlands  
 
 
12. MARKETING AUTHORISATION NUMBER(S)  
 
EU/1/17/1262/002 
 
 
13. BATCH NUMBER 
 
Lot 
 
 
14. GENERAL CLASSIFICATION FOR SUPPLY 
 
 
15. INSTRUCTIONS ON USE 
 
 
16. INFORMATION IN BRAILLE 
 
Justification for not including Braille accepted. 
 
 
17. UNIQUE IDENTIFIER – 2D BARCODE 
 
2D barcode carrying the unique identifier included. 
 
 
18. UNIQUE IDENTIFIER - HUMAN READABLE DATA 
 
PC:  
SN:  
NN:  
 



26 

MINIMUM PARTICULARS TO APPEAR ON SMALL IMMEDIATE PACKAGING UNITS 
 
20 mg VIAL  
 
 
1. NAME OF THE MEDICINAL PRODUCT AND ROUTE(S) OF ADMINISTRATION 
 
CRYSVITA 20 mg injection 
burosumab 
SC 
 
 
2. METHOD OF ADMINISTRATION 
 
 
3. EXPIRY DATE 
 
EXP 
 
 
4. BATCH NUMBER 
 
Lot 
 
 
5. CONTENTS BY WEIGHT, BY VOLUME OR BY UNIT 
 
1 ml 
 
 
6. OTHER 
 
  



27 

 
PARTICULARS TO APPEAR ON THE OUTER PACKAGING 
 
30 mg CARTON 
 
 
1. NAME OF THE MEDICINAL PRODUCT 
 
CRYSVITA 30 mg solution for injection 
burosumab 
 
 
2. STATEMENT OF ACTIVE SUBSTANCE(S) 
 
Each vial contains 30 mg burosumab in 1 ml of solution. 
 
 
3. LIST OF EXCIPIENTS 
 
Excipients: L-histidine, D- sorbitol E420, polysorbate 80, L-methionine, hydrochloric acid, 10%, and 
water for injections. 
See leaflet for further information. 
 
 
4. PHARMACEUTICAL FORM AND CONTENTS 
 
Solution for injection 
1 vial 
 
 
5. METHOD AND ROUTE(S) OF ADMINISTRATION 
 
Read the package leaflet before use. 
Subcutaneous use. 
For single use only. 
Do not shake before use. 
 
 
6. SPECIAL WARNING THAT THE MEDICINAL PRODUCT MUST BE STORED OUT 

OF THE SIGHT AND REACH OF CHILDREN 
 
Keep out of the sight and reach of children. 
 
 
7. OTHER SPECIAL WARNING(S), IF NECESSARY 
 
 
8. EXPIRY DATE 
 
EXP 
 
 



28 

9. SPECIAL STORAGE CONDITIONS 
 
Store in a refrigerator. 
Do not freeze. 
Store in the original package in order to protect from light. 
 
 
10. SPECIAL PRECAUTIONS FOR DISPOSAL OF UNUSED MEDICINAL PRODUCTS 

OR WASTE MATERIALS DERIVED FROM SUCH MEDICINAL PRODUCTS, IF 
APPROPRIATE 

 
 
11. NAME AND ADDRESS OF THE MARKETING AUTHORISATION HOLDER 
 
Kyowa Kirin Holdings B.V. 
Bloemlaan 2 
2132NP Hoofddorp 
The Netherlands  
 
 
12. MARKETING AUTHORISATION NUMBER(S)  
 
EU/1/17/1262/003 
 
 
13. BATCH NUMBER 
 
Lot 
 
 
14. GENERAL CLASSIFICATION FOR SUPPLY 
 
 
15. INSTRUCTIONS ON USE 
 
 
16. INFORMATION IN BRAILLE 
 
Justification for not including Braille accepted. 
 
 
17. UNIQUE IDENTIFIER – 2D BARCODE 
 
2D barcode carrying the unique identifier included. 
 
 
18. UNIQUE IDENTIFIER - HUMAN READABLE DATA 
 
PC:  
SN:  
NN:  
 



29 

MINIMUM PARTICULARS TO APPEAR ON SMALL IMMEDIATE PACKAGING UNITS 
 
30 mg VIAL  
 
 
1. NAME OF THE MEDICINAL PRODUCT AND ROUTE(S) OF ADMINISTRATION 
 
CRYSVITA 30 mg injection 
burosumab 
SC 
 
 
2. METHOD OF ADMINISTRATION 
 
 
3. EXPIRY DATE 
 
EXP 
 
 
4. BATCH NUMBER 
 
Lot 
 
 
5. CONTENTS BY WEIGHT, BY VOLUME OR BY UNIT 
 
1 ml 
 
 
6. OTHER 
 
 
  



30 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

B. PACKAGE LEAFLET 
  



31 

Package leaflet: Information for the user 
 

CRYSVITA 10 mg solution for injection 
CRYSVITA 20 mg solution for injection 
CRYSVITA 30 mg solution for injection 

 
burosumab 

 
This medicine is subject to additional monitoring. This will allow quick identification of new 

safety information. You can help by reporting any side effects you may get. See the end of 
section 4 for how to report side effects. 
 
Read all of this leaflet carefully before you start using this medicine because it contains 
important information for you. 
• Keep this leaflet. You may need to read it again.  
• If you have any further questions, ask your doctor. 
• If you get any side effects, talk to your doctor. This includes any possible side effects not listed 

in this leaflet. See section 4. 
 

What is in this leaflet 
1. What CRYSVITA is and what it is used for 
2. What you need to know before you use CRYSVITA 
3. How to use CRYSVITA 
4. Possible side effects 
5. How to store CRYSVITA 
6. Contents of the pack and other information 
 
 
1. What CRYSVITA is and what it is used for 
 
What CRYSVITA is 
CRYSVITA contains the active substance burosumab. This is a type of medicine called a human 
monoclonal antibody.  
 
What is CRYSVITA used for 
CRYSVITA is used to treat X-linked hypophosphataemia (XLH). It is used in children of 1 year and 
older, and adolescents who are still growing. 
 
What is X-Linked Hypophosphataemia (XLH) 
X-Linked Hypophosphataemia (XLH) is a genetic disease. 
• People with XLH have higher levels of a hormone called fibroblast growth factor 23 (FGF23). 
• FGF23 lowers the amount of phosphate in the blood. 
• The low level of phosphate may lead to bones that cannot grow and harden properly. 
 
How CRYSVITA works 
CRYSVITA attaches to FGF23 in the blood which stops FGF23 from working and increases the 
phosphate levels in the blood so that normal levels of phosphate can be achieved. 
 

2. What you need to know before you use CRYSVITA  
 

Do not use CRYSVITA if: 
• you are allergic to burosumab or any of the other ingredients of this medicine (listed in 

section 6)  
• you are taking any phosphate supplements or certain vitamin D supplements (that contain so 

called active vitamin D, e.g. calcitriol) 



32 

• you already have a high level of phosphate in your blood (“hyper-phosphataemia”) 
• you have severe kidney disease or kidney failure. 

 
Allergic reactions 
Stop taking CRYSVITA and tell your doctor straight away if you have any of the following side 
effects, as they could be signs of an allergic reaction: 
• rash and itching all over the body 
• severe swelling of eyelids, mouth or lips (angio-oedema) 
• shortness of breath 
• rapid heartbeat 
• sweating. 
 
Do not take CRYSVITA if any of the above apply to you. If you are not sure, talk to your doctor 
before using CRYSVITA. 
 
Warnings and precautions  
 
Skin reactions 
You may get skin reactions where the injection is given, see section 4 for more information. If these 
reactions are severe, tell your doctor. 
 
Tests and checks 
Your doctor will check the phosphate and calcium levels in your blood and urine and may also do a 
renal ultrasound during your treatment in order to reduce the risk of hyperphosphataemia (too much 
phosphate in the blood) and ectopic mineralisation (a build up of calcium in tissues such as the 
kidneys). Your serum parathyroid hormone level will also be checked from time to time. 
 
Children under 1 year 
Crysvita should not be given to children under 1 year of age because the safety and effects of the 
medicine have not been studied in this age group. 
 
Other medicines and CRYSVITA 
Tell your doctor if you are taking, have recently taken, or might take any other medicines.  
 
Do not take CRYSVITA and tell your doctor if you are taking: 
• phosphate supplements  
• certain vitamin D supplements (that contain so called active vitamin D, e.g. calcitriol). There are 

some vitamin D supplements you can continue or start to use and your doctor will advise which 
ones these are.  

 
Talk to your doctor before taking CRYSVITA if you are taking: 
• medicines that work in the same way as calcium in the body (“calcimimetics”). If used together 

they may lower blood calcium. 
 

Pregnancy and breastfeeding  
If you are pregnant or breast-feeding, think you might be pregnant or are planning to have a baby, ask 
your doctor or pharmacist for advice before taking this medicine. This is because it is not known if 
CRYSVITA will affect the baby. 
 
CRYSVITA is not recommended in pregnancy. 
 
If you could get pregnant, you must use an effective method of contraception (birth control) while 
using CRYSVITA. You should discuss this with your doctor. 
 
It is not known if CRYSVITA passes into breast milk, and a risk to newborns or infants cannot be 
ruled out. You should discuss this with your doctor.  



33 

 
Driving, riding a bike and using machines 
It is possible that CRYSVITA could cause dizziness and affect you being able to ride a bike, use any 
tools or machines or to drive. If you think you are affected, do not ride a bike, use any tools or 
machines or drive, and tell your doctor. 
 
CRYSVITA contains sorbitol  
This medicine contains 45.91 mg of sorbitol in each vial which is equivalent to 45.91 mg/ml.  
 
 
3. How to use CRYSVITA 
 
CRYSVITA should be given by injection under the skin in the arm, abdomen, buttock or thigh by a 
trained healthcare provider.  
 
How much CRYSVITA you will be given 
The dose is based on your body weight. Your doctor will work out the right dose for you.  
CRYSVITA will be injected every two weeks. 
 
Your doctor will perform checks to make sure that you are getting the right dose and may change your 
dose if needed. 
 
The maximum dose you will be given is 90 mg. 
 
If you have been given more CRYSVITA than you should  
If you think that you have been given too much CRYSVITA, tell your doctor straight away.  
 
If you miss a dose of CRYSVITA 
If a dose is missed, talk to your doctor straight away. The missed dose should be given as soon as 
possible and your doctor will re-arrange future doses accordingly. 
 
If you have any further questions on the use of this medicine, ask your doctor. 
 
 
4. Possible side effects 
 
Like all medicines, this medicine can cause side effects, although not everybody gets them. 
 
Side effects 
Very common (may affect more than 1 in 10 children) 
• Tooth abscess (infection) 
• Cough 
• Headache 
• Vomiting 
• Nausea 
• Diarrhoea  
• Constipation 
• Tooth decay or cavities 
• Rash 
• Pain in muscles (myalgia) and hands and feet 
• Reactions where the injection was given, which may include: 

o redness or rash 
o pain or itching 
o swelling 
o bleeding or bruising 



34 

These injection site reactions are usually mild and occur within a day after the injection and 
usually get better in around 1 to 3 days. 

• Fever 
• Low vitamin D in your blood 
 
Common (may affect up to 1 in 10 children) 
• Dizziness 
 
Reporting of side effects 
If you get any side effects, talk to your doctor or nurse. This includes any possible side effects not 
listed in this leaflet. You can also report side effects directly via the national reporting system listed in 
Appendix V. By reporting side effects, you can help provide more information on the safety of this 
medicine. 
 
 
5. How to store CRYSVITA 
 
Keep CRYSVITA out of the sight and reach of children. 
Do not use CRYSVITA after the expiry date which is stated on the carton and label. 
Store in a refrigerator (2°C to 8°C). Do not freeze. 
Keep the vial in the outer carton in order to protect from light. 
Do not use CRYSVITA if it contains visible particles. 
Any unused medicinal product or waste material should be disposed of in accordance with local 
requirements. 
 
 
6. Contents of the pack and other information 
 
What CRYSVITA contains   
The active substance is burosumab. Each vial contains either 10, 20 or 30 mg of burosumab. 
The other ingredients are L-histidine, D-sorbitol (E420), polysorbate 80, L-methionine, 10%, 
hydrochloric acid, and water for injections. (See “CRYSVITA contains sorbitol” in section 2 for more 
information). 
 
What CRYSVITA looks like and contents of the pack 
CRYSVITA comes as a clear to slightly opalescent, colourless to pale yellow/brown solution for 
injection in a small glass vial. Each pack contains 1 vial.  
 
Marketing Authorisation Holder 
Kyowa Kirin Holdings B.V. 
Bloemlaan 2 
2132NP Hoofddorp 
The Netherlands  
medinfo@kyowakirin.com 
 
Manufacturer 
Piramal Healthcare UK Limited 
Whalton Road 
Morpeth 
NE61 3YA 
United Kingdom 
 
allphamed PHARBIL Arzneimittel GmbH 
Hildebrandstr. 10-12 
37081 Göttingen 
Germany 
 

http://www.ema.europa.eu/docs/en_GB/document_library/Template_or_form/2013/03/WC500139752.doc
mailto:medinfo@kyowakirin.com


35 

This leaflet was last revised in  
 
This medicine has been given ‘conditional approval’. This means that there is more evidence to come 
about this medicine. 
The European Medicines Agency will review new information on this medicine at least every year and 
this leaflet will be updated as necessary. 
 
Other sources of information 
Detailed information on this medicine is available on the European Medicines Agency web site: 
http://www.ema.europa.eu. There are also links to other websites about rare diseases and treatments.  
 


	SUMMARY OF PRODUCT CHARACTERISTICS
	A. MANUFACTURER(S) OF THE BIOLOGICAL ACTIVE SUBSTANCE(S) AND MANUFACTURER(S) RESPONSIBLE FOR BATCH RELEASE
	B. CONDITIONS OR RESTRICTIONS REGARDING SUPPLY AND USE
	C. OTHER CONDITIONS AND REQUIREMENTS OF THE MARKETING AUTHORISATION
	D. CONDITIONS OR RESTRICTIONS WITH REGARD TO THE SAFE AND EFFECTIVE USE OF THE MEDICINAL PRODUCT
	E. SPECIFIC OBLIGATION TO COMPLETE POST-AUTHORISATION MEASURES FOR THE CONDITIONAL MARKETING AUTHORISATION
	A. LABELLING
	B. PACKAGE LEAFLET
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{'Title': '2. what you need to know before you use crysvita', 'Section_Content': 'do not use crysvita if: you are allergic to burosumab or any of the other ingredients of this medicine (listed in section 6) you are taking any phosphate supplements or certain vitamin d supplements (that contain so called active vitamin d, e.g. calcitriol) 32 you already have a high level of phosphate in your blood ("hyper-phosphataemia") you have severe kidney disease or kidney failure. allergic reactions stop taking crysvita and tell your doctor straight away if you have any of the following side effects, as they could be signs of an allergic reaction: rash and itching all over the body severe swelling of eyelids, mouth or lips (angio-oedema) shortness of breath rapid heartbeat sweating. do not take crysvita if any of the above apply to you. if you are not sure, talk to your doctor before using crysvita. warnings and precautions skin reactions you may get skin reactions where the injection is given, see section 4 for more information. if these reactions are severe, tell your doctor. tests and checks your doctor will check the phosphate and calcium levels in your blood and urine and may also do a renal ultrasound during your treatment in order to reduce the risk of hyperphosphataemia (too much phosphate in the blood) and ectopic mineralisation (a build up of calcium in tissues such as the kidneys). your serum parathyroid hormone level will also be checked from time to time. children under 1 year crysvita should not be given to children under 1 year of age because the safety and effects of the medicine have not been studied in this age group. other medicines and crysvita tell your doctor if you are taking, have recently taken, or might take any other medicines. do not take crysvita and tell your doctor if you are taking: phosphate supplements certain vitamin d supplements (that contain so called active vitamin d, e.g. calcitriol). there are some vitamin d supplements you can continue or start to use and your doctor will advise which ones these are. talk to your doctor before taking crysvita if you are taking: medicines that work in the same way as calcium in the body ("calcimimetics"). if used together they may lower blood calcium. pregnancy and breastfeeding if you are pregnant or breast-feeding, think you might be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine. this is because it is not known if crysvita will affect the baby. crysvita is not recommended in pregnancy. if you could get pregnant, you must use an effective method of contraception (birth control) while using crysvita. you should discuss this with your doctor. it is not known if crysvita passes into breast milk, and a risk to newborns or infants cannot be ruled out. you should discuss this with your doctor. driving, riding a bike and using machines it is possible that crysvita could cause dizziness and affect you being able to ride a bike, use any tools or machines or to drive. if you think you are affected, do not ride a bike, use any tools or machines or drive, and tell your doctor. crysvita contains sorbitol this medicine contains 45.91 mg of sorbitol in each vial which is equivalent to 45.91 mg/ml.', 'Entity_Recognition': [{'Text': 'crysvita', 'Type': 'PRODUCT_NAME', 'BeginOffset': 0, 'EndOffset': 0}, {'Text': 'allergic', 'Type': 'PROBLEM', 'BeginOffset': 32, 'EndOffset': 40}, {'Id': 10, 'BeginOffset': 44, 'EndOffset': 53, 'Score': 0.8089857697486877, 'Text': 'burosumab', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': []}, {'Text': 'this medicine', 'Type': 'TREATMENT', 'BeginOffset': 89, 'EndOffset': 102}, {'Text': '6', 'Type': 'NUMBER', 'BeginOffset': 122, 'EndOffset': 123}, {'Text': 'any phosphate supplements', 'Type': 'TREATMENT', 'BeginOffset': 140, 'EndOffset': 165}, {'Text': 'certain vitamin d supplements', 'Type': 'TREATMENT', 'BeginOffset': 169, 'EndOffset': 198}, {'Text': 'active vitamin 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{'Title': '3. how to use crysvita', 'Section_Content': 'crysvita should be given by injection under the skin in the arm, abdomen, buttock or thigh by a trained healthcare provider. how much crysvita you will be given the dose is based on your body weight. your doctor will work out the right dose for you. crysvita will be injected every two weeks. your doctor will perform checks to make sure that you are getting the right dose and may change your dose if needed. the maximum dose you will be given is 90 mg. if you have been given more crysvita than you should if you think that you have been given too much crysvita, tell your doctor straight away. if you miss a dose of crysvita if a dose is missed, talk to your doctor straight away. the missed dose should be given as soon as possible and your doctor will re-arrange future doses accordingly. if you have any further questions on the use of this medicine, ask your doctor.', 'Entity_Recognition': [{'Text': 'crysvita', 'Type': 'PRODUCT_NAME', 'BeginOffset': 0, 'EndOffset': 0}, {'Id': 0, 'BeginOffset': 0, 'EndOffset': 8, 'Score': 0.4049486815929413, 'Text': 'crysvita', 'Category': 'ANATOMY', 'Type': 'SYSTEM_ORGAN_SITE', 'Traits': []}, {'Id': 2, 'BeginOffset': 48, 'EndOffset': 52, 'Score': 0.994785487651825, 'Text': 'skin', 'Category': 'ANATOMY', 'Type': 'SYSTEM_ORGAN_SITE', 'Traits': []}, {'Id': 3, 'BeginOffset': 60, 'EndOffset': 63, 'Score': 0.9962210059165955, 'Text': 'arm', 'Category': 'ANATOMY', 'Type': 'SYSTEM_ORGAN_SITE', 'Traits': []}, {'Id': 4, 'BeginOffset': 65, 'EndOffset': 72, 'Score': 0.9975075721740723, 'Text': 'abdomen', 'Category': 'ANATOMY', 'Type': 'SYSTEM_ORGAN_SITE', 'Traits': []}, {'Id': 5, 'BeginOffset': 74, 'EndOffset': 81, 'Score': 0.9922569990158081, 'Text': 'buttock', 'Category': 'ANATOMY', 'Type': 'SYSTEM_ORGAN_SITE', 'Traits': []}, {'Id': 6, 'BeginOffset': 85, 'EndOffset': 90, 'Score': 0.9741511940956116, 'Text': 'thigh', 'Category': 'ANATOMY', 'Type': 'SYSTEM_ORGAN_SITE', 'Traits': []}, {'Text': 'your body weight', 'Type': 'TEST', 'BeginOffset': 182, 'EndOffset': 198}, {'Text': 'crysvita', 'Type': 'TREATMENT', 'BeginOffset': 250, 'EndOffset': 258}, {'Text': '90', 'Type': 'NUMBER', 'BeginOffset': 448, 'EndOffset': 450}, {'Id': 10, 'BeginOffset': 619, 'EndOffset': 627, 'Score': 0.2055327296257019, 'Text': 'crysvita', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': []}, {'Text': 'this medicine', 'Type': 'TREATMENT', 'BeginOffset': 842, 'EndOffset': 855}]}
{'Title': '4. possible side effects', 'Section_Content': 'like all medicines, this medicine can cause side effects, although not everybody gets them. side effects very common (may affect more than 1 in 10 children) tooth abscess (infection) cough headache vomiting nausea diarrhoea constipation tooth decay or cavities rash pain in muscles (myalgia) and hands and feet reactions where the injection was given, which may include: o redness or rash o pain or itching o swelling o bleeding or bruising 34 these injection site reactions are usually mild and occur within a day after the injection and usually get better in around 1 to 3 days. fever low vitamin d in your blood common (may affect up to 1 in 10 children) dizziness reporting of side effects if you get any side effects, talk to your doctor or nurse. this includes any possible side effects not listed in this leaflet. you can also report side effects directly via the national reporting system listed in appendix v. by reporting side effects, you can help provide more information on the safety of this medicine.', 'Entity_Recognition': [{'Text': 'crysvita', 'Type': 'PRODUCT_NAME', 'BeginOffset': 0, 'EndOffset': 0}, {'Text': 'all medicines', 'Type': 'TREATMENT', 'BeginOffset': 5, 'EndOffset': 18}, {'Text': 'this medicine', 'Type': 'TREATMENT', 'BeginOffset': 20, 'EndOffset': 33}, {'Id': 8, 'BeginOffset': 44, 'EndOffset': 56, 'Score': 0.9662430286407471, 'Text': 'side effects', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.78664630651474}]}, {'Id': 9, 'BeginOffset': 92, 'EndOffset': 104, 'Score': 0.8717595934867859, 'Text': 'side effects', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.7299414873123169}]}, {'Id': 10, 'BeginOffset': 122, 'EndOffset': 128, 'Score': 0.3319384753704071, 'Text': 'affect', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': []}, {'Text': '1', 'Type': 'NUMBER', 'BeginOffset': 139, 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'EndOffset': 569}, {'Text': '3', 'Type': 'NUMBER', 'BeginOffset': 573, 'EndOffset': 574}, {'Text': 'fever low vitamin d', 'Type': 'PROBLEM', 'BeginOffset': 581, 'EndOffset': 600}, {'Text': '1', 'Type': 'NUMBER', 'BeginOffset': 640, 'EndOffset': 641}, {'Text': '10', 'Type': 'NUMBER', 'BeginOffset': 645, 'EndOffset': 647}, {'Id': 33, 'BeginOffset': 658, 'EndOffset': 667, 'Score': 0.9867750406265259, 'Text': 'dizziness', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.9059632420539856}]}, {'Id': 34, 'BeginOffset': 681, 'EndOffset': 693, 'Score': 0.7260191440582275, 'Text': 'side effects', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.8275005221366882}]}, {'Id': 35, 'BeginOffset': 709, 'EndOffset': 721, 'Score': 0.9025413990020752, 'Text': 'side effects', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.8270818591117859}]}, {'Id': 36, 'BeginOffset': 780, 'EndOffset': 792, 'Score': 0.9499834179878235, 'Text': 'side effects', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.7257232666015625}]}, {'Id': 37, 'BeginOffset': 841, 'EndOffset': 853, 'Score': 0.8432700037956238, 'Text': 'side effects', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.7135433554649353}], 'Attributes': [{'Type': 'SYSTEM_ORGAN_SITE', 'Score': 0.3810620605945587, 'RelationshipScore': 0.5852580070495605, 'RelationshipType': 'SYSTEM_ORGAN_SITE', 'Id': 7, 'BeginOffset': 907, 'EndOffset': 915, 'Text': 'appendix', 'Category': 'ANATOMY', 'Traits': []}]}, {'Id': 7, 'BeginOffset': 907, 'EndOffset': 915, 'Score': 0.3810620605945587, 'Text': 'appendix', 'Category': 'ANATOMY', 'Type': 'SYSTEM_ORGAN_SITE', 'Traits': []}, {'Id': 38, 'BeginOffset': 932, 'EndOffset': 944, 'Score': 0.8627005219459534, 'Text': 'side effects', 'Category': 'MEDICAL_CONDITION', 'Type': 'DX_NAME', 'Traits': [{'Name': 'SYMPTOM', 'Score': 0.7586812973022461}]}, {'Text': 'this medicine', 'Type': 'TREATMENT', 'BeginOffset': 1001, 'EndOffset': 1014}]}
{'Title': '5. how to store crysvita', 'Section_Content': 'keep crysvita out of the sight and reach of children. do not use crysvita after the expiry date which is stated on the carton and label. store in a refrigerator (2 to 8). do not freeze. keep the vial in the outer carton in order to protect from light. do not use crysvita if it contains visible particles. any unused medicinal product or waste material should be disposed of in accordance with local requirements.', 'Entity_Recognition': [{'Text': 'crysvita', 'Type': 'PRODUCT_NAME', 'BeginOffset': 0, 'EndOffset': 0}, {'Text': 'crysvita', 'Type': 'TREATMENT', 'BeginOffset': 65, 'EndOffset': 73}, {'Text': 'the outer carton', 'Type': 'TREATMENT', 'BeginOffset': 203, 'EndOffset': 219}, {'Text': 'crysvita', 'Type': 'TREATMENT', 'BeginOffset': 263, 'EndOffset': 271}, {'Text': 'any unused medicinal product', 'Type': 'PROBLEM', 'BeginOffset': 306, 'EndOffset': 334}, {'Text': 'waste material', 'Type': 'PROBLEM', 'BeginOffset': 338, 'EndOffset': 352}]}
{'Title': '6. contents of the pack and other information', 'Section_Content': 'what crysvita contains the active substance is burosumab. each vial contains either 10, 20 or 30 mg of burosumab. the other ingredients are l-histidine, d-sorbitol (e420), polysorbate 80, l-methionine, 10%, hydrochloric acid, and water for injections. (see "crysvita contains sorbitol" in section 2 for more information). what crysvita looks like and contents of the pack crysvita comes as a clear to slightly opalescent, colourless to pale yellow/brown solution for injection in a small glass vial. each pack contains 1 vial.', 'Entity_Recognition': [{'Text': 'crysvita', 'Type': 'PRODUCT_NAME', 'BeginOffset': 0, 'EndOffset': 0}, {'Id': 0, 'BeginOffset': 47, 'EndOffset': 56, 'Score': 0.9576519727706909, 'Text': 'burosumab', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': [], 'Attributes': [{'Type': 'DOSAGE', 'Score': 0.28243502974510193, 'RelationshipScore': 0.971827507019043, 'RelationshipType': 'DOSAGE', 'Id': 1, 'BeginOffset': 84, 'EndOffset': 99, 'Text': '10, 20 or 30 mg', 'Category': 'MEDICATION', 'Traits': []}]}, {'Text': '10', 'Type': 'NUMBER', 'BeginOffset': 84, 'EndOffset': 86}, {'Text': '20', 'Type': 'NUMBER', 'BeginOffset': 88, 'EndOffset': 90}, {'Text': '30', 'Type': 'NUMBER', 'BeginOffset': 94, 'EndOffset': 96}, {'Id': 2, 'BeginOffset': 103, 'EndOffset': 112, 'Score': 0.9825558662414551, 'Text': 'burosumab', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': [], 'Attributes': [{'Type': 'DOSAGE', 'Score': 0.28243502974510193, 'RelationshipScore': 0.9969907999038696, 'RelationshipType': 'DOSAGE', 'Id': 1, 'BeginOffset': 84, 'EndOffset': 99, 'Text': '10, 20 or 30 mg', 'Category': 'MEDICATION', 'Traits': []}]}, {'Text': 'l-histidine, d-sorbitol', 'Type': 'TREATMENT', 'BeginOffset': 140, 'EndOffset': 163}, {'Id': 5, 'BeginOffset': 172, 'EndOffset': 186, 'Score': 0.5838378667831421, 'Text': 'polysorbate 80', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': []}, {'Id': 6, 'BeginOffset': 188, 'EndOffset': 200, 'Score': 0.9913823008537292, 'Text': 'l-methionine', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': [], 'Attributes': [{'Type': 'STRENGTH', 'Score': 0.9956052899360657, 'RelationshipScore': 0.811771810054779, 'RelationshipType': 'STRENGTH', 'Id': 7, 'BeginOffset': 202, 'EndOffset': 205, 'Text': '10%', 'Category': 'MEDICATION', 'Traits': []}]}, {'Text': '10', 'Type': 'NUMBER', 'BeginOffset': 202, 'EndOffset': 204}, {'Id': 8, 'BeginOffset': 207, 'EndOffset': 224, 'Score': 0.9951149225234985, 'Text': 'hydrochloric acid', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': [], 'Attributes': [{'Type': 'ROUTE_OR_MODE', 'Score': 0.446158230304718, 'RelationshipScore': 0.9984059929847717, 'RelationshipType': 'ROUTE_OR_MODE', 'Id': 9, 'BeginOffset': 240, 'EndOffset': 250, 'Text': 'injections', 'Category': 'MEDICATION', 'Traits': []}]}, {'Text': 'injections', 'Type': 'TREATMENT', 'BeginOffset': 240, 'EndOffset': 250}, {'Id': 10, 'BeginOffset': 276, 'EndOffset': 284, 'Score': 0.5835374593734741, 'Text': 'sorbitol', 'Category': 'MEDICATION', 'Type': 'GENERIC_NAME', 'Traits': []}, {'Text': '2', 'Type': 'NUMBER', 'BeginOffset': 297, 'EndOffset': 298}, {'Text': 'the pack crysvita', 'Type': 'TREATMENT', 'BeginOffset': 363, 'EndOffset': 380}, {'Text': 'pale yellow/brown solution', 'Type': 'PROBLEM', 'BeginOffset': 436, 'EndOffset': 462}, {'Text': 'a small glass vial', 'Type': 'TREATMENT', 'BeginOffset': 480, 'EndOffset': 498}, {'Text': '1', 'Type': 'NUMBER', 'BeginOffset': 519, 'EndOffset': 520}]}