This page explains what happens if Furosemide and Metformin are taken together, according to official sources.
Altered metformin kinetics and dehydration risk
Furosemide increases metformin peak plasma concentrations; diuretic-induced dehydration significantly magnifies lactic acidosis hazard.
Maintain adequate hydration and monitor renal function. Discontinue metformin temporarily during acute dehydration or acute illness.
Last updated: Sep 25, 2026
Before changing or stopping any medicine, ask your doctor or pharmacist. Never stop your medicine on your own.