Yuetanin is the trade name of Metformin Hydrochloride Extended-Release Tablets, and its price is affected by different manufacturers, different geographic regions, different distributors, different packaging specifications and other factors, and there is no uniform pricing in the market at present, which is usually around $8 to $25 a box. The drug is a hypoglycemic agent, which has the effect of improving glucose tolerance and lowering basal and postprandial blood glucose in patients with type 2 diabetes. Its mechanism of action is different from other types of oral antiglycemic drugs in that it reduces hepatic glucose production, decreases intestinal absorption of sugar, and improves insulin sensitivity by increasing peripheral sugar uptake and utilization. Clinically the drug is indicated for patients with type 2 diabetes who cannot obtain good control with diet and exercise therapy alone. Adverse effects such as dizziness, headache, nausea, rash, and fatigue have been associated with the drug. It is contraindicated in type 2 diabetes mellitus with ketoacidosis, hepatic and renal insufficiency, heart failure, severe infections and trauma, major surgery, clinical conditions of hypotension and hypoxia, previous history of lactic acidosis. The drug is prohibited to be chewed orally, should be swallowed whole and taken during or after meals; renal function, blood glucose, glycosylated hemoglobin, urinary glucose, urine ketone body and other conditions should be regularly monitored during the period of taking the drug. If you need medication, you should consult a specialist and buy it from a hospital or regular pharmacy.