<prompt> Impotence is most commonly caused by which antihypeensive agent-Calcium channel blockerACE inhibitorsATI receptor antagonistsb-blockers  <response>: Ans. is d i.e., b - blockers Amongst the antihypeensive agents the thiazide diuretics and b-blockers have been implicated most frequently. o Calcium channel blockers and ACE inhibitors are less frequently cited. 