Botulinum toxin: preferred treatment for hemifacial spasm

Area of Science:

• Neurology
• Ophthalmology

Background:

• Hemifacial spasm (HFS) is a neuromuscular disorder characterized by involuntary contractions of facial muscles.
• Benign etiologies are common, but serious intracranial pathologies must be ruled out in atypical presentations.
• Conventional oral medications often yield unsatisfactory results for managing HFS.

Purpose of the Study:

• To retrospectively analyze the clinical data of hemifacial spasm patients.
• To evaluate the efficacy and duration of relief provided by botulinum toxin injections.
• To assess the long-term effectiveness of repeated botulinum toxin treatments for HFS.

Main Methods:

• Retrospective analysis of clinical data from 65 consecutive hemifacial spasm cases.
• Neuroradiologic investigations were performed for atypical cases to exclude intracranial pathology.
• Treatment outcomes were assessed for patients receiving oral medications and botulinum toxin injections.

Main Results:

• The majority of cases presented with clinically evident benign etiologies.
• Oral medication trials in 26 patients were consistently unsuccessful.
• Fifty-one patients received repeated botulinum toxin injections over 8 years, with a mean effective relief duration of 18.9 weeks per treatment.
• The efficacy of botulinum toxin did not diminish with repeated administrations.

Conclusions:

• Botulinum toxin injections are a highly effective treatment for hemifacial spasm.
• Repeated botulinum toxin treatments offer sustained and non-diminishing relief for hemifacial spasm.
• Botulinum toxin therapy is a viable alternative when oral medications prove ineffective for hemifacial spasm.