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Effect of ranitidine on chloroquine disposition
E I Ette1, A Brown-Awala, E E Essien
1Clinical Pharmacy and Biopharmacy Department, School of Pharmacy, College of Medicine, University of Lagos, Idi-Araba, Nigeria.
Drug Intelligence & Clinical Pharmacy
|September 1, 1987
Summary
Ranitidine does not affect how the body processes chloroquine. This study found no significant pharmacokinetic interactions between ranitidine and chloroquine, suggesting ranitidine is a safe choice for patients needing both medications.
Area of Science:
- Pharmacology
- Drug Interactions
- Clinical Pharmacology
Background:
- Drug interactions can alter the efficacy and safety of medications.
- Understanding pharmacokinetic interactions is crucial for patient care.
- H2-receptor antagonists are commonly used for acid-related disorders.
Purpose of the Study:
- To investigate the pharmacokinetic interaction between ranitidine and chloroquine.
- To determine if ranitidine affects the disposition of chloroquine in healthy volunteers.
Main Methods:
- A randomized controlled study involving ten healthy male volunteers.
- Administration of chloroquine sulfate with and without ranitidine pretreatment.
- Analysis of blood samples for chloroquine levels using thin-layer chromatography and ultraviolet spectrophotometry.
- Statistical comparison of pharmacokinetic parameters using the Wilcoxon test.
Main Results:
- Ranitidine did not significantly alter chloroquine oral clearance rate, elimination rate constant, or apparent volume of distribution.
- No significant pharmacokinetic interaction was observed between ranitidine and chloroquine.
- Results contrast with known interactions of other H2-receptor antagonists like cimetidine.
Conclusions:
- Ranitidine does not exhibit clinically significant pharmacokinetic interactions with chloroquine.
- Ranitidine may be a preferred H2-receptor antagonist for patients requiring concurrent chloroquine therapy.
- This finding supports the safe co-administration of ranitidine and chloroquine.