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Updated: Feb 18, 2026

Ultrasound-guided Botulinum Toxin-A Injections: A Method of Treating Sialorrhea
Published on: November 9, 2016
Botulinum toxin treatment for hypersalivation in anti-NMDA receptor encephalitis
Jin-Sun Jun1, Han Gil Seo2, Soon-Tae Lee1
1Department of Neurology Seoul National University Hospital Seoul South Korea.
Abstract:
Hypersalivation is one of the intractable symptoms of anti-N-methyl-d-aspartate receptor (NMDAR) encephalitis. While anticholinergic medications partially improve the hypersalivation, they can aggravate the autonomic dysfunctions associated with anti-NMDAR encephalitis. Thus, we investigated the efficacy and safety of botulinum toxin type A injection on hypersalivation refractory to anticholinergics in six patients with anti-NMDAR encephalitis. Hypersalivation was well-controlled without remarkable adverse reaction over 16 weeks after botulinum toxin type A, although two patients were reinjected at 12 weeks due to reaggravation of hypersalivation. Our findings suggest that botulinum toxin type A might be a better choice than anticholinergics for management of hypersalivation in patients with anti-NMDAR encephalitis.
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