This prescription drug (sold under brand names such as Fortamet®, Glucophage®, Glumetza®, Riomet® and Trijardy®) treats type 2 diabetes. It may be used alone or combined with other drugs as part of a comprehensive care plan. Metformin belongs to a class of drugs we call "biguinides."
How does it work? Metformin comes as a tablet or a liquid you take by mouth. You take it one to three times a day. Metformin helps control the amount of glucose (that's "sugar") in your blood. It lowers the amount of glucose you absorb from the foods you eat. It also lowers the amount of glucose made by your liver. And, metformin helps your body respond to insulin. That's a substance in your body that lets your cells take in glucose from your blood so they can turn it into energy.
Metformin does have side effects such as bloating, gas and stomach pain. It can cause diarrhea or constipation. It can cause heartburn and headaches. Ask your doctor for a full list of side effects. Also, you should know that this drug may not be safe to use if you have certain drug allergies. If you're taking other drugs or supplements, your doctor may need to change their doses. And we may need to watch you closely to see if metformin causes any issues. Before taking this medication, make sure your doctor knows about all medical conditions you have and all medications and supplements you are taking, both prescription and over-the-counter.
Metformin can be helpful for many people when used correctly. So read all the instructions and warnings. Take it only as directed. For more info, talk to your doctor.