Atropine Drops for Sialorrhoea Management

First-Line Approach: Anticholinergic Therapy

The American College of Chest Physicians recommends starting with an initial trial of inexpensive oral anticholinergic agents, including sublingual atropine drops, as first-line therapy for sialorrhoea, continuing use only if benefits outweigh side effects 1, 2, 3, 4, 5, 6
The American College of Chest Physicians 2023 guidelines explicitly recommend anticholinergic medications as the initial treatment for sialorrhoea in neuromuscular disease, emphasizing their relative affordability and ready availability 1, 2, 3, 4, 5, 6
The balance of benefits and risks for anticholinergics is considered neutral because some patients experience symptomatic relief while others do not tolerate them well 1, 4, 5

Sialorrhoea significantly reduces quality of life and increases the risk of aspiration pneumonia due to impaired swallowing, airway protection, and cough effectiveness 1, 2, 3, 4, 5, 6
The CHEST guidelines emphasize that untreated sialorrhoea in neuromuscular disease, particularly ALS, causes substantial distress and functional impairment 1, 2, 3, 4, 5, 6

Doses less than 0.5 mg may paradoxically slow heart rate due to parasympathomimetic response 7

Continue sublingual atropine if benefits exceed side effects, as individual tolerance varies significantly 1, 4, 5
Escalate treatment if inadequate response, considering anticholinergic patches or subcutaneous glycopyrrolate formulations 1, 2, 3, 4, 5, 6
Reserve botulinum toxin or radiation therapy for refractory cases with significant debility 1, 2, 3, 4, 5, 6

Do not use atropine in combination with fixed-dose diphenoxylate preparations (Lomotil) for diarrhea management, as this combination has been associated with adverse outcomes in specific contexts 8

The American College of Cardiology recommends that doses less than 0.5 mg of atropine can paradoxically cause bradycardia due to a parasymphaticomimetic response in patients with sialorrhea 9, 10

In pediatric patients, doses of up to 0.1 mg/kg of atropine may be necessary, as doses of 0.05 mg/kg were only minimally effective, according to the American Society of Anesthesiologists 11
The American Society of Anesthesiologists also notes that atropine should not be stopped in the presence of tachycardia in children, as repeated doses do not cause cardiac arrhythmias in the pediatric population, unlike in adults 11