Treatment of clozapine-induced hypersalivation with ipratropium bromide: a randomized, double-blind, placebo-controlled crossover study. The Journal of clinical psychiatry [J Clin Psychiatry] Journal article | | Title | Treatment of clozapine-induced hypersalivation with ipratropium bromide: a randomized, double-blind, placebo-controlled crossover study. | | Author(s) | Sockalingam S, Shammi C, Remington G | | Institution | University Health Network, Toronto General Hospital 8EN-225, 200 Elizabeth St, Toronto, Ontario M5G 2C4, Canada. sanjeev.sockalingam@uhn.on.ca | | Source | J Clin Psychiatry 2009 Aug; 70(8):1114-9. | | MeSH | Adolescent
Adult
Aged
Cholinergic Antagonists
Clozapine
Cross-Over Studies
Double-Blind Method
Female
Humans
Ipratropium
Male
Middle Aged
Psychotic Disorders
Questionnaires
Schizophrenia
Severity of Illness Index
Sialorrhea
Treatment Outcome
| | Abstract | OBJECTIVE: Clozapine-induced hypersalivation (CIH) occurs in up to 57% of treated patients and can be the source of considerable subjective distress. Previous open-label studies suggest that sublingual ipratropium bromide may be effective in treating CIH.
METHOD: We conducted a randomized, double-blind, placebo-controlled crossover trial to evaluate the efficacy of ipratropium in 20 individuals with CIH between September 2006 and August 2007. This study was 5 to 6 weeks in duration, based on the participants' clozapine blood-monitoring schedule, and it consisted of two 2-week crossover phases separated by a 1- or 2-week washout period. Primary outcome measures included the reduction in the Toronto Nocturnal Hypersalivation Scale (TNHS) and the Clinical Global Impressions-Severity of Illness (CGI-S) and -Improvement (CGI-I) scales. Secondary outcomes included visual analog scales assessing hypersalivation severity (VAS-S) and distress (VAS-D).
RESULTS: No significant reduction in CIH was found on the TNHS (P = .379), CGI-S (P = .266), or CGI-I (P = .599). Moreover, no difference was noted between study groups on the VAS-S (P = .969) and VAS-D (P = .527). There was no difference in the number of CIH responders at the conclusion of the 2-week placebo (40%, n = 8) and ipratropium (45%, n = 9) study phases (45%, n = 9) according to the TNHS. Randomization order did not have a significant effect on TNHS, CGI-S, or CGI-I scores. Tolerability was comparable between groups, with dry mouth occurring in 1 placebo group subject and 2 ipratropium group subjects.
CONCLUSIONS: Despite the reports of some preliminary studies that ipratropium is an efficacious treatment for CIH, ipratropium failed to demonstrate significant clinical effect in comparison to placebo. Further research should explore the efficacy of other locally acting anticholinergic agents or other classes of medications.
TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT00381589. | | Language | eng | | Pub Type(s) | Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
| | PubMed ID | 19758522 |
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