what are the side effects of metformin

Metformin, a common medication for type 2 diabetes, can cause various side effects. The most common ones, which affect more than 1 in 100 people, include nausea, vomiting, diarrhea, abdominal discomfort, and a decreased appetite. These can often be managed by taking metformin with food or adjusting the dosage. Less common side effects, affecting less than 1 in 100 people, may include anxiety, blurred vision, chest discomfort, and cold sweats. In rare cases, metformin can lead to serious side effects such as lactic acidosis, vitamin B12 deficiency, and a serious allergic reaction. If you experience symptoms such as extreme tiredness, weakness, or discomfort, it's important to contact your doctor immediately