Title: Sulfa Allergies: Should You Avoid Other Drugs if You're Allergic to Bactrim? - GoodRx
Headings: The Truth About Sulfa Allergies: Should You Avoid Other Drugs if You’re Allergic to Bactrim?
The Truth About Sulfa Allergies: Should You Avoid Other Drugs if You’re Allergic to Bactrim?
Sharon Orrange, MD, MPH
I was told I had a sulfa allergy. What does that mean?
How do I know if I have a sulfa allergy?
How is Bactrim different from other sulfa drugs?
If I have a sulfa allergy from Bactrim, can I take these other drugs?
To sum it up

Content: Triptan medications that are used to treat migraines, including eletriptan, frovatriptan, and sumatriptan, have been shown to be safe in those with reported sulfa allergies. Tamsulosin (Flomax) used to treat symptoms related to enlarged prostate or benign prostatic hypertrophy (BPH), is safe to take in folks with a sulfa allergy. Sulfa-based eye drops like Genoptic (gentamicin sulfate), Polytrim (polymyxin B/trimethoprim), atropine sulfate, and Maxitrol (neomycin/dexamethasone/polymyxin B) are safe to use in those with reported sulfa allergies. What should you NOT use with a sulfa allergy? Blephamide eye drops. To sum it up
The evidence from clinical trials suggests that folks who have had an allergic reaction to the antibiotic, Bactrim (trimethoprim/sulfamethoxazole or TMP/SMX), do not need to routinely avoid all sulfa-type drugs, including those listed above. – – –
Hope this helps. Dr O.