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  • Title: The effect of sublingual atropine sulfate on clozapine-induced hypersalivation: a multicentre, randomised placebo-controlled trial.
    Author: Mubaslat O, Lambert T.
    Journal: Psychopharmacology (Berl); 2020 Oct; 237(10):2905-2915. PubMed ID: 32876732.
    Abstract:
    BACKGROUND: Hypersalivation and drooling are commonly reported in clozapine-treated patients. Current management strategies have been evaluated using subjective measures. Many case reports describe the successful use of atropine in the treatment of the condition. AIMS: To measure the effect and safety of sublingual atropine on nocturnal unstimulated saliva secretion. Secondary aims were to evaluate the patient's satisfaction with the atropine effect on hypersalivation (or sialorrhea), drooling, and sleep. METHOD: Twenty-one clozapine-treated patients with hypersalivation, or drooling, were randomised to take a single 600-μg dose of sublingual atropine drops or a matching placebo. The saliva secretion was measured over 5 min at baseline and 2 h after the administration of the study medication. RESULTS: Sublingual atropine reduced the saliva secretion significantly more than the placebo (mean difference = - 57.21%, 95% CI: - 104.30, - 10.11, P = 0.02). A significant decrease in standing pulse rate was recorded in the participants in the atropine group (- 5.8 (- 9.54, - 2.15), P = 0.002). Subjectively, more patients in the atropine group found their pillow to have less saliva the following morning and found their sleep to be better. CONCLUSIONS: Sublingual atropine drops significantly reduces nocturnal unstimulated clozapine-induced saliva secretion. More research is required to compare the effect of sublingual atropine with other anticholinergic medications and different dosage forms. TRIAL REGISTRATION: ACTRN12618000051246.
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