Tag: Metformin effectiveness

According to the American Diabetes Association, metformin is the recommended initial oral medication for type 2 diabetes. For individuals starting this treatment, a significant question arises: **How much can A1C drop in 3 months on metformin?** The typical reduction is about 1 to 1.5 percentage points, with the full therapeutic effect often taking around three months of consistent use to become apparent.

The U.S. Food and Drug Administration (FDA) requires that all medications, including metformin, carry an expiration date to guarantee the drug's full potency and safety up to that point. Therefore, the simple answer to 'Is metformin still good after a year?' is no, because its effectiveness and safety cannot be guaranteed by the manufacturer beyond that labeled date.