<prompt> Which of the following diuretic causes impaired glucose tolerance?SpironolactoneThiazidesAmilorideCanrenone  <response>: Ans. is b i.e., Thiazides Drugs causing hyperglycemia Asparaginase Ethacrinic acid HIV protease inhibitors Pentamidine Chlorthalidone Frusemide Niacin Thiazides Diazoxide Glucocorticoids OCP b-adrenergic agonists Encainide Growth-hormone Phenytoin b-blockers propranolol Thyroid hormones Vacor Clozapine a-IFN Glucagon Cyclosporine Tacrolimus Protease inhibitors L-Asparaginase 