関連ワード:  side effect of metformin    side effect of metformin 500 mg    side effect of metformin tablet    side effect of metformin on kidney    side effect of metformin in women    side effect of metformin in pregnancy    side effect of metformin in men    side effect of metformin 1000 mg    side effect of metformin hydrochloride    side effect of metformin hcl 500 mg