What are the efficacy and side effects of metformin hydrochloride sustained-release tablets?

Metformin sustained-release tablets have the following benefits: weight reduction, blood glucose lowering, improvement of insulin resistance, cardiovascular protection, and improvement of non-alcoholic fatty liver disease. However, potential side effects may include allergic reactions, gastrointestinal disturbances, vitamin B12 malabsorption, lactic acidosis, and hypoglycemic reactions. A detailed analysis is as follows:

I. Benefits

1. Weight reduction: Metformin sustained-release tablets can reduce fat synthesis and increase fat oxidation, thereby helping with weight control.

2. Blood glucose lowering: Metformin sustained-release tablets lower blood glucose levels by inhibiting hepatic glucose production, increasing glucose uptake and utilization in muscles, and improving insulin sensitivity.

3. Improvement of insulin resistance: Metformin sustained-release tablets enhance the body's sensitivity to insulin, thus improving insulin resistance, reducing the burden on pancreatic beta cells, and prolonging their functional lifespan.

4. Cardiovascular protection: Metformin sustained-release tablets can reduce the risk of cardiovascular events.

5. Improvement of non-alcoholic fatty liver disease: Metformin sustained-release tablets improve liver inflammation, steatosis, and fibrosis, contributing to liver health.

II. Side Effects

1. Allergic reactions: A small number of patients may be allergic to metformin, presenting symptoms such as rash and itching.

2. Gastrointestinal reactions: Common symptoms include nausea, vomiting, and a metallic taste in the mouth.

3. Vitamin B12 malabsorption: Long-term use of metformin may lead to vitamin B12 deficiency, resulting in macrocytic anemia and malabsorption issues.

4. Lactic acidosis: Metformin sustained-release tablets may cause lactic acidosis in patients with renal impairment.

5. Hypoglycemic reaction: Hypoglycemia may occur when metformin is used alone or in combination with other antidiabetic agents; blood glucose levels should be monitored accordingly after administration.

Before using metformin sustained-release tablets, it is important to follow medical advice and regularly monitor blood glucose levels. If any of the above side effects occur during treatment, prompt medical attention is required.