Does Warfarin Interact with Atovaquone And Proguanil Hydrochloride?
Warfarin and Atovaquone And Proguanil Hydrochloride have a major drug interaction according to U.S. FDA drug labeling data. Proguanil may potentiate the anticoagulant effect of warfarin. Coagulation tests should be closely monitored. The mechanism involves potentiation of anticoagulant effect; mechanism not established. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Major
- Atovaquone And Proguanil Hydrochloride Class
- Antimalarial
- Management
- Close medical supervision required
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Warfarin and Atovaquone And Proguanil Hydrochloride occurs because potentiation of anticoagulant effect; mechanism not established. Clinically, this means proguanil may potentiate the anticoagulant effect of warfarin. coagulation tests should be closely monitored. This is classified as a major interaction, meaning it could cause serious harm if not properly managed. Your healthcare provider may need to adjust dosages, substitute one medication, or increase monitoring frequency.
What To Tell Your Doctor or Pharmacist
If you are taking Warfarin and your doctor is considering prescribing Atovaquone And Proguanil Hydrochloride (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask how frequently you should be monitored while these are co-prescribed
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider