Author:Kevin Shin, PharmD, BCPS + InpharmD™ AI
INTRODUCTION BY INPHARMD™ RESEARCHER
There is a paucity of data directly comparing sublingual atropine with hyoscyamine or transdermal scopolamine patches. Currently, no direct head-to-head studies have assessed these agents in terms of efficacy, safety, or cost. Nonetheless, available literature reports improvement in sialorrhea symptoms with each agent, albeit with substantial heterogeneity in dosing and study design, limiting comparability. Notably, scopolamine and hyoscyamine demonstrated higher potency than atropine in one ...
A 2024 meta-analysis reviewed 56 studies (totaling 2,378 patients) to evaluate the effectiveness of atropine in managing sialorrhea (excessive drooling) across diverse conditions, including brain injury, amyotrophic lateral sclerosis (ALS), cerebral palsy, clozapine- or perphenazine-induced sialorrhea, Parkinson’s disease, and terminal illness. The analysis incorporated randomized controlled trials, case reports, retrospective reviews, and systematic reviews, assessing outcomes such as reduced salivary flow rate, drooling intensity, and death rattle. Results demonstrated that atropine is efficacious across most disease states. Sublingual administration (typically using off-label atropine eye drops) was statistically superior to oral, subcutaneous, and intravenous routes in reducing salivary flow, as confirmed by generalized estimating equation (GEE) regression models controlling for dose variability (p= 0.045). This superiority is attributed to direct anticholinergic effects on subl...
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A search of the published medical literature revealed
2 studies investigating the researchable question:
What is the evidence for atropine sublingually for sialorrhea? What is the dosage? Are there comparative studies against other drugs?
Level of evidence
B - One high-quality study or multiple studies with limitations
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[1] Yellepeddi VK, Race JA, McFarland MM, Constance JE, Fanaeian E, Murphy NA. Effectiveness of atropine in managing sialorrhea: A systematic review and meta-analysis. Int J Clin Pharmacol Ther. 2024;62(6):267-277. doi:10.5414/CP204538
[2] Petkus KD, Noritz G, Glader L. Examining the Role of Sublingual Atropine for the Treatment of Sialorrhea in Patients with Neurodevelopmental Disabilities: A Retrospective Review. J Clin Med. 2023;12(16):5238. Published 2023 Aug 11. doi:10.3390/jcm12165238
[3] Van der Poorten T, De Hert M. The sublingual use of atropine in the treatment of clozapine-indu...
Author: Open AI GPT
Use of Atropine Sublingually for Sialorrhea
Evidence
Sialorrhea, or excessive drooling, can be managed with various interventions, including the use of atropine. Atropine, an anticholinergic agent, works by decreasing saliva production. Although there is limited large-scale clinical trial data, several smaller studies and case reports suggest that sublingual atropine may be effective in reducing sialorrhea, especially in patients with neurological disorders such as Parkinson's disease or cerebral palsy.
Dosage
The typical starting dosage of atropine for sialorrhea is 0.4 to 0.6 mg sublingually, which can be adjusted based on the patient’s response and tolerance. It’s important to start with the lowest effective dose to minimize potential side effects, such as dry mouth, blurred vision, or urinary retention.
Comparative Studies
Comparative studies between atropine and other treatments for sialorrhea, such as glycopyrrolate or botulinum toxin injections, are limited. However, available data suggest that atropine can be a viable alternative, especially for patients who need a non-invasive and readily adjustable treatment option. Each treatment has its own profile of efficacy, side effects, and convenience, which must be evaluated on a case-by-case basis.
Conclusion
While atropine sublingually can be an effective treatment for sialorrhea, it should be used under medical supervision, with careful consideration of dosage and patient-specific factors. Further research, including comparative trials, would help to better define its place among sialorrhea treatments.