Hello Glycomet 500 mg i.e. METFORMIN actually this is a very potent drug for diabetes but equally very much effective in PCOD cases . Since you are having Poly Ovarian Cystic Disease ( pcod ) , so your doctor advised this drug fir you. Side effects are : Anorexia, nausea , vomiting , diarrhea, WEIGHT LOSS , flatulence, occasionally metallic taste, weakness , hypoglycemia, rash chest discomfort , flushing , palpitation, abdominal discomfort, lactic acidosis in renal failure case. Now about PCOD , in this there develop WEIGHT GAIN , hirsutism , acne , hormonal imbalance , altered FSH/ LH ratio, change in ovarian stroma , androgen high level . So your over weight may be due to PCOD and if it treated your weight will decrease. . Hope this information will be helpful for you.