It could be, especially if you:
· have kidney disease;
· have liver disease;
· have congestive heart failure;
· have acute or chronic metabolic acidosis, including diabetic ketoacidosis;
· have had a heart attack or a stroke;
· have a serious infection, illness, or injury;
· need to have surgery;
· need to have x-rays or other procedures using injectable contrast agents;
· are dehydrated (have lost water from your body) due to diarrhea, vomiting, fever, heat stroke, decreased fluid intake, or any other cause;
· drink alcohol; or
· are 80 years of age or older and have not had your kidney function tested

The biggest problem I see with it, though, is that you don't seem to have type 2 diabetes and just took a drug used to treat it. This is a problem because the metformin doesn't know that you don't have type 2 diabetes and will do what it's designers intended it to do anyways. That is reduce the amount of glucose produced and absorbed by your body and stimulate the insulin in your body. You'll probably be fine, but i'm no medical doctor.
Nullific Reviewed by Nullific on . CODEINE Okay so i have two tablets here. The bottle says: APAP/CODEINE TAB 300/30M GENERIC FOR TYLENOL/COD There are actually two different tablets (???) one says: 93 150 Rating: 5