Corticosteroid treatment of childhood Bell's palsy. Influence of early high-dose steroid treatment on Bell's palsy evolution. Valacyclovir and prednisolone treatment for Bell's palsy: a multicenter, randomized, placebo-controlled study. The use of steroids in Bell's palsy: a prospective controlled study. Bell's palsy treatment with acyclovir and prednisone compared with prednisone alone: a double-blind, randomized, controlled trial.
The therapeutic effect of corticosteroids in acute idiopathic peripheral nerve paralysis (Bell's palsy) in children is controversial. The authors evaluated the effect of steroids on the early and late outcome of children with Bell's palsy in a prospective randomized controlled setting. Forty-two patients (21 females, 21 males) with complete paralysis were enrolled in the study. Group 1 (n = 21) received methylprednisolone (1 mg/kg daily for 10 days orally); Group 2 (n = 21) did not. All patients were observed in the first 3 days of the disease and at 4, 6, and 12 months of follow-up. The mean age of Group 1 was 52.4 +/- 4.3 months, not significantly different from that of Group 2. In Group 1, 86% and 100% exhibited normal nerve function at 4 and 6 months of follow-up, respectively; in Group 2, 72% and 86% demonstrated complete recovery at 4 and 6 months, respectively, with improvement in all patients by 12 months. The improvement rates between the treated and untreated groups did not differ significantly. No side effects necessitated steroid withdrawal. The results of this study indicate that steroid therapy initiated at an early stage of childhood Bell's palsy does not significantly improve the outcome. The objective of this double-blind, randomized, placebo-controlled study was to test the efficacy of high-dose prednisone, administered as early as possible, in modifying the natural progression of Bell's palsy. Sixty-two consecutive patients, enrolled within 72 hours of facial palsy onset, were assigned to high dose intravenous prednisone in combination with intramuscular polyvitaminic therapy (group A) or polyvitaminic therapy alone (group B). Clinical grading of facial muscle strength and length of absence from work were evaluated. An early worsening of facial muscle strength was observed in controls, leading to the divergence in the trends of the grading scores in the two groups; this result was not confirmed in the long-term follow-up. Treated patients returned to work earlier than controls. In conclusion, early treatment based on high-dose corticosteroids slightly accelerates spontaneous improvement in Bell's palsy. To investigate the effects of valacyclovir and prednisolone in comparison with those of placebo and prednisolone for the treatment of Bell's palsy, excluding zoster sine herpete.
                Prospective, multicenter, randomized placebo-controlled study.
                Six academic tertiary referral centers.
                Ultimately, 221 patients with Bell's palsy who were treated within 7 days of the onset. Serological and polymerase chain reaction examinations were performed to distinguish Bell's palsy from zoster sine herpete.
                The patients were treated with either valacyclovir (dosage, 1,000 mg/d for 5 days) plus prednisolone (VP [n = 114]) or placebo plus prednisolone (PP [n = 107]) administered orally.
                Recovery from the palsy was defined as a score higher than 36 using Yanagihara 40-point scoring system without facial contracture or synkinesis. The patients were followed up until complete recovery occurred or for more than 6 months in cases with a poor prognosis.
                The overall rate of patient recovery among those treated with VP (96.5%) was significantly better (p < 0.05) than the rate among those treated with PP (89.7%). The rate of patient recovery was also analyzed by classifying the initial severity of facial palsy. In cases of complete or severe palsy, the rates of patients treated with VP and PP who recovered were 95.7% (n = 92) and 86.6% (n = 82), respectively; the recovery rate for treatment with VP was significantly better than that with PP (p < 0.05).
                The valacyclovir and prednisolone therapy was more effective in treating Bell's palsy, excluding zoster sine herpete, than the conventional prednisolone therapy. To our knowledge, this is the first controlled study of an antiviral agent in the treatment of a sufficient number of Bell's palsy cases based on an etiologic background. A prospective, controlled, double-blind study was designed to evaluate the effect of steroid treatment on the natural history of Bell's palsy. Fifty-one patients were included in the study between 1972 and 1974. The patients were evaluated and started on treatment within two days of onset of Bell's palsy and followed for six months. Treatment was given in randomized double-blind fashion and consisted of either vitamins or a total of 410 mg of prednisone plus vitamins in descending doses over 10 days. The recovery of facial motor function was determined by three physicians who had no knowledge of the treatment received by the patients. They examined photographs of the patients taken six months after onset of paralysis in eight positions of facial function and categorized them as to complete fair, or poor recovery of facial function. These results of this evaluation were submitted to the biostatistician who broke the treatment code. The results of this study demonstrate no statistically significant beneficial effect of steroid therapy upon recovery from Bell's palsy. Factors considered included the patients' age, sex, the presence of pain, ageusia, hyperacusis, diabetes, hypertension, the progression and degree of palsy, the results of nerve excitability and salivary flow tests, and the time at which recovery was first noted or became complete. Bell's palsy remains without a proven efficacious treatment. In a double-blind study, we compared the final outcome of 99 Bell's palsy patients treated with either acyclovir-prednisone (53 patients) or placebo-prednisone (46 patients). For patients receiving acyclovir, the dosage was 2,000 mg (400 mg 5 times daily) for 10 days. Electrical tests included electroneurography and the maximal stimulation test. Univariate comparisons of outcome and electrical tests between the two groups were made with chi 2 analysis, Fisher's exact test, and t-tests. The outcome in acyclovir-prednisone-treated patients was superior to that in placebo-prednisone-treated patients. Treatment with acyclovir-prednisone was statistically more effective in returning volitional muscle motion (recovery profile of 10; p = .02) and in preventing partial nerve degeneration (p = .05) than placebo-prednisone treatment. The t-tests indicated that the recovery profile and index means were significantly better for the acyclovir-treated group (recovery profile t = 1.99, p = .051; recovery index t = 2.10, p = .040). We conclude that acyclovir-prednisone is superior to prednisone alone in treating Bell's palsy patients and suggest that herpes simplex is the probable cause of Bell's palsy.
The available evidence from randomised controlled trials shows significant benefit from treating Bell's palsy with corticosteroids.