Metformin hydrochloride extended-release tablets are usually not broken and taken, so you can not take half a tablet. Metformin hydrochloride extended-release tablets adopt unique extended-release technology, avoiding the defect of short half-life of metformin hydrochloride ordinary dosage form, which can maintain the effective blood concentration in a longer period of time and improve the bioavailability of the drug. It has a longer duration of action and better effect on controlling blood sugar. If broken to take will destroy the slow-release structure, can not achieve the purpose of slow release, so it is not recommended to break to take. Specific medication should be taken under the guidance of a doctor. Diabetes is a chronic disease, in addition to standardized medication, you also need to pay attention to life and diet regulation, good diabetes knowledge education, and good management of blood sugar.