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Biliary excretion of reduced haloperidol glucuronide
1Department of Pharmaceutics, School of Pharmacy, Baltimore, MD 21201.
Psychopharmacology
|January 1, 1990
Summary
This study found that reduced haloperidol glucuronide is a major biliary metabolite in guinea pigs, suggesting its importance in haloperidol drug disposition and excretion.
Area of Science:
- Pharmacology
- Drug Metabolism
- Biliary Excretion
Background:
- Haloperidol is an antipsychotic medication.
- Understanding its metabolic pathways, particularly biliary excretion, is crucial for optimizing therapeutic use.
Purpose of the Study:
- To investigate the biliary excretion of haloperidol and its metabolite, reduced haloperidol, in guinea pigs.
- To identify and quantify glucuronide conjugates of these compounds in bile.
Main Methods:
- Bile duct cannulated guinea pigs received intraperitoneal haloperidol.
- Bile was collected over 12 hours and analyzed using High-Performance Liquid Chromatography (HPLC).
- Samples were incubated with beta-glucuronidase to detect glucuronide metabolites.
Main Results:
- No significant haloperidol glucuronide was detected in bile.
- Reduced haloperidol glucuronide was identified as a novel metabolite.
- Excretion of reduced haloperidol glucuronide was significantly higher than free haloperidol or reduced haloperidol.
Conclusions:
- Reduced haloperidol glucuronide is a significant biliary metabolite in guinea pigs.
- This metabolite may play a key role in the overall disposition of haloperidol and its reduced form.