Please try it! many many people take it with little to no side effects. I have had GI issues for years before taking the metformin - so knew it was pretty much a given for me. I still choose to take the meformin and manage the side effects.
Typically it comes in 500 mg pills. Dosage can be anywhere from 1 to 4 pills a day. If your dosage is more than one a day - still start with 1. Give it a few days and then add a 2nd. Many times doctors will have you take 1 in the morning and 1 in the evening to overlap the doses. This is also gentler on your system.
1 pill once a day does not give my any problems. I take 2 pills twice a day so deal with the side effects.