What do I do about the side effects of metformin?

Try extended release. Patients who have side effects on metformin often find that they are less if they take the extended release form of the medication. Since this form is only taken once a day it may help to take it at bedtime.
Speak with your Dr!! Most common side effect is upset stomach or diarrhea. If you can stick it out symptoms will get better and probably go away. Sometimes a lower starting dose is all you need. It can rarely cause a serious electrolyte imbalance called acidosis so you should call your doctor to talk about it. Overall it is usually pretty safe.