title: Prospective, randomized, double-blind study, comparing botulinum toxins type a botox and prosigne for blepharospasm and hemifacial spasm treatment.
abstract: Botulinum toxin A (BTA) is considered an effective treatment of blepharospasm and hemifacial spasm, but there are few studies to permit a comparison of its different formulations. This prospective, randomized, double-blind study compared Prosigne, a BTA of Chinese origin, with Botox to establish safety, efficacy, and equivalence of doses between those 2 formulations in blepharospasm and hemifacial spasm treatment. Fifty-seven patients participated in this study: 21 blepharospasm (from whom 11 were treated with Botox; and 10, with Prosigne) and 36 hemifacial spasm patients (17 were treated with Botox; and 19, with Prosigne). All patients were similar in age, disease time span, number of previous shots, and time elapsed since the last BTA application. Pain and burning during the injection and the result of the treatment were similar in both groups. There were no systemic adverse events, and the local ones were observed with similar intensity and frequency for both groups. The mean effect time length was similar for both blepharospasm (11.3 weeks for both toxins) and hemifacial spasm patients (12.8 weeks for Botox and 12.9 weeks for Prosigne). In both blepharospasm groups, only the 36-Item Short-Form Health Survey emotional aspects domain showed improvement from baseline after 16 weeks. There were no differences between the 36-Item Short-Form Health Survey scores before and after the treatment of all hemifacial spasm patients. Therefore, it has been concluded that Botox and Prosigne have similar efficacy, safety, and tolerability profiles, so that a dose equivalence of 1:1 may be considered for blepharospasm and hemifacial spasm treatments.
authors.affiliation: Neurology Department, Faculdade de Ciências Médicas da Universidade Estadual de Campinas, São Paulo, Brazil.
authors.forename: Elizabeth Maria Aparecida Barasnevicius
authors.initials: EM
authors.lastname: Quagliato
authors.forename: Edmur Franco
authors.initials: EF
authors.lastname: Carelli
authors.forename: Maura Aparecida
authors.initials: MA
authors.lastname: Viana
mesh_terms: D000368:Aged; D001764:Blepharospasm / Q000150:complications / Q000188:drug therapy*; D019274:Botulinum Toxins, Type A / Q000627:therapeutic use*; D004185:Disability Evaluation; D004311:Double-Blind Method; D004365:Drugs, Chinese Herbal / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D019569:Hemifacial Spasm / Q000150:complications / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009498:Neurotoxins / Q000627:therapeutic use*; D010147:Pain Measurement; D011446:Prospective Studies; D012720:Severity of Illness Index
chemical_list: D004365:Drugs, Chinese Herbal; D009498:Neurotoxins; D019274:Botulinum Toxins, Type A