Why the US aisle does not stock 850 mg
Prescription status follows the Glucophage label: a clinician selects metformin for type 2 diabetes after kidney assessment. Over-the-counter status would skip that cut. The US product did not take that path.
Cough syrups sit on open shelves. Metformin 850 mg does not. Treating the tablet like a vitamin is how people skip eGFR and the boxed lactic-acidosis warning.
Where to go once you accept it is not OTC
Written starts live on getting a US 850. The panel holds the 850 GI lock. Do not use this page to invent a grocery strength.
Board-check stops here: no aisle, no quiz-only carton, no borrowed blister as a first start.
Whether XR changes the prescription rule
Glucophage XR is also prescription-only. Swallow-whole and evening-meal rules do not move it onto a shelf. Release type is a separate identity job on IR versus XR.
People hunt 'OTC metformin' after reading foreign pages. This board tags the US Glucophage 850 mg product as prescription.
What a clinic has to see before any 850
Estimated GFR comes first. Glucose pattern and other medicines come with it. Those are not aisle decisions. The order scan covers the written start.
Hepatic disease and heavy alcohol use sit in the same caution set as the kidney. A clerk cannot collect that history from a barcode.
How 'no prescription needed' shops fail the board
Safe online pharmacies still require a prescription from a licensed clinician, a US address and phone, state licensure, and a pharmacist who can answer questions. A cart that ships Glucophage 850 mg after a quiz only is not that list.
FDA BeSafeRx exists to name those signs. This OTC page only needs the negative: no US walk-up, and no honest skip of the script.