Furosemide and Phentermine and topiramate interaction
Furosemide and Phentermine and topiramate: the Phentermine and topiramate prescribing label describes an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Phentermine and topiramate label · effective 2026-05-18
In addition, when phentermine and topiramate extended-release capsules are used in conjunction with nonpotassium sparing diuretics this may further potentiate potassium-wasting.
…phentermine and topiramate extended-release capsules dosage reduction or discontinuation if cognitive dysfunction persists [see Warnings and Precautions (5.5) ] Non-Potassium Sparing Diuretics Clinical Impact Concurrent use of phentermine and topiramate extended-release capsules with non-potassium sparing diuretics may potentiate the potassium-wasting action of…
Intervention When phentermine and topiramate extended-release capsules are used concomitantly with non-potassium-sparing diuretics, measure potassium before and during phentermine and topiramate extended-release capsules treatment [see Warnings and Precautions (5.12) and Clinical Pharmacology (12.3) ] .
Non-potassium Sparing Diuretics : May potentiate hypokalemia.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.