Medical Dictionary
Main Entry:
sil·den·a·fil Pronunciation:
sil-'den-&-"fil Function:
noun : a drug that is used in the form of its citrateC
22H
30N
6O
4S to treat erectile dysfunction in males, that by suppressing a phosphodiesterase enzyme also suppresses the enzyme's inhibitory effect on thehormone cyclic GMP, and that enables the cyclic GMP produced during sexual arousal to initiate the muscular and vascular changes which produce an erection —see
VIAGRA