Abstract
Thirty-nine patients with adductor spasmodic dysphonia currently under treatment with botulinum toxin estimated their vocal and social function before and during treatment in percentage of normal. Subjective symptoms and side effects were registered. All patients had positive effects. Mean improvement was 45 per cent for voice function and 47 per cent for social function. Eleven patients (28 per cent) claimed they had a completely normal voice for a short period between injections. Thirty-three patients (85 per cent) reported a considerably breathy voice quality lasting several weeks after injection on one or more occasions. Sixteen patients had experienced slight deglutition problems. In spite of these side effects, the results confirm that the overall efficacy of treatment of adductor spasmodic dysphonia with botulinum toxin is very high.
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