Each Glucophage 500mg tablet contains:Active Ingredients: Metformin hydrochloride Povidone, Magnesium stearate, Hypromellose, Sodium carboxymethyl cellulose, Microcrystalline cellulose Fact Table Formula C4H11N5 License EU EMA, US FDA Bioavailability 50-60% Legal status RX Only Chemical Name Metformin Elimination half-life 4-8.7 hours Dosage (Strength) 1% (30 grams), 2.5% (50 grams) Pregnancy Consult a doctor Brands Glucophage, Glucophage XR, Fortamet, Glumetza, Riomet Protein binding Minimal PubChem CID 4091 MedlinePlus a696005 ChEBI 6801 ATC code A10BA02, A10BD23, A10BD02, A10BD18, A10BD11, A10BD25, A10BD22, A10BD14, A10BD16, A10BD17, A10BD05, A10BD15, A10BD07, A10BD10, A10BD13, A10BD20, A10BD08, A10BD03 DrugBank DB00331 KEGG D04966 Routes of administration By mouth