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Published on: May 27, 2021
Clinical implications of drug interactions with coxibs
1Department of Pharmacy Virginia Commonwealth University, Medical College of Virginia, Richmond 23298, USA. wrgarnett@hsc.vcu.edu
Pharmacotherapy
|October 17, 2001
Summary
Cyclooxygenase (COX)-2 inhibitors (coxibs) like rofecoxib and celecoxib have different drug interaction profiles than nonsteroidal anti-inflammatory drugs (NSAIDs). While coxibs offer advantages, monitoring is recommended due to potential drug interactions.
Area of Science:
- Pharmacology
- Drug Metabolism
- Drug Interactions
Background:
- Nonsteroidal anti-inflammatory drugs (NSAIDs) are frequently prescribed with other medications.
- Cyclooxygenase (COX)-2 inhibitors (coxibs) selectively inhibit COX-2, unlike nonselective NSAIDs.
- Both coxibs and NSAIDs undergo hepatic metabolism, but via different pathways.
Purpose of the Study:
- To compare the drug interaction profiles of rofecoxib and celecoxib.
- To differentiate the metabolic pathways and interaction potentials of coxibs versus NSAIDs.
- To highlight the clinical implications of coxib metabolism and pharmacodynamics.
Main Methods:
- Review of metabolic pathways for rofecoxib (reduction) and celecoxib (cytochrome P450 system).
- Analysis of potential drug interactions based on enzyme involvement (CYP2C9, CYP2D6).
- Comparison of pharmacodynamic interactions, particularly renal prostaglandin inhibition and antiplatelet activity.
Main Results:
- Rofecoxib has fewer confirmed drug interactions due to limited CYP metabolism.
- Celecoxib's metabolism by CYP2C9 and inhibition of CYP2D6 can lead to significant interactions.
- Coxibs lack antiplatelet activity, potentially benefiting patients on antithrombotic therapy.
Conclusions:
- Rofecoxib and celecoxib exhibit distinct drug interaction profiles.
- Monitoring is advised when initiating or discontinuing coxibs due to potential interactions.
- Further research is needed to fully elucidate the drug interaction profiles of coxibs.
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