The Efficacy of Botulinum Toxin A in Treating Palmar Hyperhidrosis - a Literature Review.

Background: Palmar hyperhidrosis, a condition characterized by excessive sweating in the palms, considerably impacts the quality of life (QoL). Although various treatment modalities are available, the efficacy and safety of Botulinum toxin type A (BTX-A) needed further investigation. Methods: We conducted a literature review, with open-label, controlled trial, double-blind placebo-controlled and observational designs being eligible for inclusion, according to the PRISMA guidelines. Results: All the six selected studies consistently reported the efficacy of BTX-A in reducing symptoms of hyperhidrosis, without significant side effects. Botulinum toxin type A treatment was found to improve the QoL significantly, to reduce sweat rate and production and to have no detrimental effect on grip strength. The duration of the antisudorific effect also indicated the potential for long-term management of palmar hyperhidrosis with BTX-A. Conclusions: Our findings corroborated the effectiveness and safety of BTX-A in managing palmar hyperhidrosis across diverse patient outcomes and experiences. Botulinum toxin type A emerged as a promising treatment modality for this condition, capable of improving the QoL, reducing symptoms and offering long-term relief without significant side effects.