What do you mean by "weird"? Metformin has a reputation for causing gastic distress in the beginning. Our recommendation is to be sure your doc prescribes the extended release version & starts you out on a low dose. Are you experiencing something besides cramping & diarrhea?
I take 2550 mg of the Regular. In the beginning I had some of the GI symptoms and a lot of gas, but after a few months it did go away. I also found my appetitie tends to be a lot less on Metformin. Also if I overeat carbs or the wrong foods now, I will get an uspet stomach and bloated feeling.