On average, how long do the effects of botulinum toxin last in your axillary hyperhidrosis patients?
The effects of botulinum toxin last at least 4 months and up to 6 months in most patients, according to 58% of dermatologists surveyed. Thirty percent reported 2 to 4 months, and 13% reported more than 6 months.
Expert Commentary
Provided by Shari R. Lipner, MD, PhD (New York, New York)
OnabotulinumtoxinA is approved by the US Food and Drug Administration for severe primary axillary hyperhidrosis. Injections are ideally placed at the dermal-subcutaneous junction, with 1 unit placed every 1 to 2 cm. Dosing is 50 to 100 U per axilla with higher dosing required for the palms and soles (off label). Reported efficacy for axillary hyperhidrosis is 82% to 87%; however, 50% of patients with plantar hyperhidrosis are dissatisfied with the treatment. Sweat reduction is most apparent after 2 weeks and typically persists 6 to 8 months in clinical trials (Botox package insert).
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