Background: Sialorrhea, hyperhidrosis, bromhidrosis, and chromhidrosis are common glandular disorders that substantially impact patients' health and quality of life. Botulinum toxin can safely and temporarily decrease gland secretions by targeting the parasympathetic cholinergic neurons, resulting in diminished saliva and sweat production.
Objective: The objective of this article is to describe the applications of neuromodulators for the treatment of salivary, eccrine, and apocrine glands.
Methods: PubMed was searched from inception to February 1, 2024 using search terms "neurotoxin," "botulinum toxin," "sialorrhea," "hyperhidrosis," "bromhidrosis," and "chromhidrosis."
Results: Incobotulinumtoxin A and Rimabotulinumtoxin B are approved by the FDA for the treatment of sialorrhea. Onabotulinumtoxin A is the only FDA-approved botulinum toxin for axillary hyperhidrosis and is used off-label for hyperhidrosis of nonaxillary sites, bromhidrosis, and chromhidrosis. Compared to botulinum toxin serotype A, serotype B has been associated with more immunogenicity, which may have implications for patients requiring long-term treatment for chronic glandular disorders.
Conclusion: Neuromodulators are safe and effective for the noninvasive treatment of excess gland activity and can improve patients' quality of life. While substantial literature supports botulinum toxin treatments for hyperhidrosis, further studies are needed to characterize standard dosing and administration techniques for sialorrhea, bromhidrosis, and chromhidrosis.
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