Active substance
Metformin
6 products from 4 companies contain this in United States.
6 prescription onlyTablet, Extended ReleaseTablet, Film Coated, Extended Release
Prescription only
Metformin500 mgPrescription only Ingenus Pharmaceuticals, LLC · MetforminMetformin1000 mgPrescription only Ingenus Pharmaceuticals, LLC · MetforminMetformin1000 mgPrescription only Coupler LLC · MetforminMetformin1000 mgPrescription only REMEDYREPACK INC. · MetforminMetformin Hydrochloride1000 mgPrescription only Mylan Pharmaceuticals Inc. · MetforminMetformin Hydrochloride500 mgPrescription only Mylan Pharmaceuticals Inc. · Metformin
Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.