is an oral antidiabetic
drug in the biguanide class. It is the first-line drug of choice for the treatment of type 2 diabetes, in particular, in overweight
and obese people and those with normal kidney function.It is also used in the treatment of polycystic ovary syndrome
The most common adverse effect of metformin is gastrointestinal upset, including diarrhea, cramps, nausea, vomiting and increased flatulence; metformin is more commonly associated with gastrointestinal side effects than most other antidiabetic drugs.The most serious potential side effect of metformin use is lactic acidosis; this complication is very rare, and the vast majority of these cases seem to be related to comorbid conditions, such as impaired liver or kidney function, rather than to the metfrmin.
as a complication of Metformin therapy is not well documented.I will advise you to consult your doctor and get the basic investigation done to see if there is potentially treatable cause for this rather than simply thinking it to be because of metformin.