MATERIAL and METHODS: We performed an open, prospective, comparative trial comparing CBTX-A and Botox for the treatment of BS and HFS in 273 patients since 2006. 107 patients were treated with current Botox and166 with CBTX-A, with the age, disease durations and severity of spasm matched. The patients enrolled were followed up for 6 months.

RESULTS: There were no significant differences in the clinical effects of the two preparations, including the onset of response, peaked effect time and duration of effects (p>0.05). The Cohen scores showed a significant reduction after BTX-A injections. Considerable improvement of symptoms for the BS and HFS patients was observed 7days, 4weeks, 12weeks, and 24 weeks after the injection with either current Botox or CBTX-A (p<0.05). There was no significant difference in the effectiveness rate for both HFS patients and BS patients between CBTX-A group and Botox group (p>0.05). No statistical differences were noted in adverse reactions between them (p>0.05).

CONCLUSION: The two preparations were both simple and effective for the patients with blepharospasm and hemifacial spasm. Keywords : Botulinum toxin type A, Blepharospasm, Hemifacial spasm, Comparison