Hi, Thanks for the query. I understand your concern. Metformin facilitates caloric consumption & reduces body fat...so it is given for weight reduction.. But it needs efforts to restrict caloric intake as per dietitian s advise& increase caloric consumption by regular physical activities as well as a strong will power & determination to continue the advised regime strictly....probably this has not been followed by you.. that s why the lack of response. Thyroid function tests are also advised to exclude/ confirm hypothyroidism.. (which can lead to overweight_) followed by specific treatment as per need would help in controlling the weight. You should consult a physical trainer& dietitian to follow strict diet &physical exercise regime along with the pills Bigomet sr 500mg . This will give you desired effect. Thanks.