Metformin is a prescription drug used for diabetes. The class called biguanides is directly related to metformin. And it helps a lot in keeping the blood sugar level in your body normal. However, it is common for some light to show side effects.
Talking about its side effects, there is something like this. Such as stomach irritation, abdominal pain, nausea or vomiting, bloating, gas, diarrhea, constipation, weight loss, headache, unpleasant metallic taste in mouth, etc.
If you are using it with the advice of a doctor. So you will probably see these side effects starting to subside after a while. By the way, the main side effects are nausea, vomiting and diarrhea. Keep in touch with your doctor