<prompt> Gynaecomastia is caused by -SpironolactoneRifampicinThiazidePropranolol  <response>: Ans. is a i.e., Spironolactone Drugs causing gynecomastia Calcium channel antagonist o Isoniazide o Reserpine o Clomiphene o Ketoconazole Digitalis o Methyldopa o Estrogens o Phenytoin o Cimetidine Ethionamide o Testosterone o Griseofulvin o Spironolactone 