what are the side effects of metformin
Metformin may cause some side effects, including stomach symptoms such as diarrhea, bloating, stomach pain, gas, indigestion, constipation, and heartburn. Metformin may give you an unpleasant taste in your mouth. Metformin may also cause headaches, make your skin flush, cause changes to your fingernails, and cause muscle pain.
The most common adverse effect of metformin is gastrointestinal irritation, including diarrhea, cramps, nausea, vomiting, and increased flatulence; metformin is more commonly associated with gastrointestinal side effects than most other antidiabetic drugs.
Metformin is generally well tolerated. Common side effects include diarrhea, nausea and abdominal pain. It has a low risk of developing low blood sugar. High blood lactic acid level is a concern if the drug is prescribed inappropriately and in overly large doses.