how long can you stay on metformin
Responses (1) Metformin has an elimination half-life of approximately 17.6 hours. It takes approximately 5.5 x elimination half life's for a medicine to be cleared from your system, therefore it'll be in your system for that long. So metformin will be in your system for 96.8 hours i.e. 4 days (5.5 x 17.6 hours).