<prompt> The 5a reductase inhibitor that has been found to be effective both in benign prostatic hyperophy and male pattern baldness is:FlutamideFinasteridePrazosinMinoxidil  <response>: Finasteride and dutasteride are 5 alpha reductase inhibitors. Flutamide is androgen receptor antagonist. Prazosin is alpha blocker. Minoxidil is potassium channel opener. 