Abstract
Palmar hyperhidrosis is a common disorder of excessive sweating due to over-stimulation of cholinergic receptors on eccrine glands. To compare the efficacy of laser-assisted drug delivery of onabotulinum toxin A (BoNTA) and intradermal BoNTA injections in the management of palmar hyperhidrosis. This intrapatient comparative study was conducted on 30 adult patients with idiopathic palmar hyperhidrosis. The palms of the patients were divided into 2 groups. Group 1 was treated with intradermal injections of 50 units of BoNTA, whereas Group 2 was subjected to laser-assisted transcutaneous BoNTA delivery using fractional CO2 laser at different doses (25, 50, and 75 units). Each treatment modality was evaluated using the iodine starch test, hyperhidrosis disease severity scale, and gravimetric scoring. Delivery of 75 units of BoNTA to the dermis on the right-sided palms assisted by fractional CO2 laser was clinically equivalent to 50 units of injection on the left side. Pain intensity was significantly higher on the injected side than on the other side. Laser-assisted drug delivery of botulinum toxin can be considered an effective and safe alternative for treatment of palmar hyperhidrosis with minimal side effects and complications.
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