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Updated: Aug 3, 2026

Ultrasound-guided Botulinum Toxin-A Injections: A Method of Treating Sialorrhea
Published on: November 9, 2016
Management of Frey's syndrome and hypersialorrhea with botulinum toxin
1Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, D-50924 Cologne, Germany. orlando.guntinas@uni-koeln.de
Abstract:
Botulinum toxin (BTX) is a safe and reliable drug for the treatment of Frey's syndrome and hypersialorrhea. Currently, the intradermal injection of BTX is the standard treatment of Frey's syndrome. A disappearance of Frey's syndrome for 1 to 1.5 year could almost be promised. Recently, BTX was introduced for the treatment of hypersialorrhea. Although some questions exist about the optimal dosage and the type of major salivary glands that should be treated, hypersialorrhea was reduced in almost all affected children and adults for up to 6 months by using ultrasound-guided intraglandular BTX injections.
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