Metformin is metformin hydrochloride, metformin hydrochloride has different dosage forms, different dosage forms, different specifications, the dosage to be taken is also different, the specific circumstances need to follow the doctor’s instructions. The specifications of Metformin Hydrochloride Tablets are 0.25g, 0.5g, 0.85g, the starting dose of each 0.25g tablet is 0.25g, 2~3 times a day, the starting dose of each 0.5g tablet is 0.5g, 2 times a day, the starting dose of each 0.85g tablet is 0.85g, 1 time a day. The dosage can be gradually increased according to the patient’s blood glucose control, and the specific conditions should follow the doctor’s instructions. Metformin hydrochloride enteric-coated tablets with specifications of 0.5g, 0.85g two kinds, usually the starting dose of 0.25g, twice a day, and then can be adjusted according to the blood glucose situation, usually the maximum daily dose does not exceed 1.8g. Metformin hydrochloride extended-release tablets are available in 0.5g, and the usual starting dose is 0.5g once daily, with a maximum dose of 2.0g daily. Some patients may experience nausea, vomiting, and diarrhea after taking Metformin. It is contraindicated for those who are allergic to it. Patients who need to take Metformin for treatment should be under the guidance of a doctor, and are advised to go to the hospital if they experience any discomfort during the course of taking the drug.