Efficacy and Safety of Treatments for Primary Palmar Hyperhidrosis: A Systematic Review Assessing Patient-Centric Outcomes.

Primary palmar hyperhidrosis (PH) is a chronic condition characterized by excessive sweating in the palms, significantly affecting the quality of life (QOL) of affected individuals. Despite the availability of various treatment modalities, the long-term efficacy and safety of these interventions remain unclear, warranting a comprehensive evaluation. This systematic review aims to assess the efficacy, safety and patient-reported outcomes of treatments for PH. A systematic search was conducted in PubMed, Embase and the Cochrane Library from their inception until March 2024, adhering to PRISMA guidelines. Inclusion criteria focused on prospective and retrospective studies examining PH treatments published in English. Data from eligible studies were extracted, analysed qualitatively and reported based on outcomes, including efficacy, QOL improvements and adverse effects. Fourteen studies, including 1733 patients aged 4-77 years, were included in the final review. The treatments assessed included oral and topical oxybutynin, iontophoresis, botulinum toxin A injections, photodynamic therapy (PDT) and endoscopic thoracic sympathectomy (ETS). Oral oxybutynin demonstrated symptomatic relief in 60%-97% of the patients although anticholinergic side effects were frequently reported. ETS, while providing the highest rates of complete sweat cessation, was associated with compensatory hyperhidrosis. Noninvasive treatments like iontophoresis showed moderate efficacy with minimal side effects but required ongoing sessions for maintenance. This review highlights the efficacy of several therapeutic approaches for PH though most treatments are hindered by significant adverse effects or practical limitations. Future research should prioritize long-term studies and standardized outcome measures to guide clinical decision-making more effectively.