title: Viagra: on release. Evidence on the effectiveness of sildenafil is good.
authors.forename: A
authors.initials: A
authors.lastname: Gregoire
mesh_terms: D011307:Drug Prescriptions; D004791:Enzyme Inhibitors / Q000600:supply & distribution / Q000627:therapeutic use*; D006801:Humans; D018783:Impotence, Vasculogenic / Q000188:drug therapy*; D008297:Male; D010879:Piperazines / Q000600:supply & distribution / Q000627:therapeutic use*; D011687:Purines; D016032:Randomized Controlled Trials as Topic; D000068677:Sildenafil Citrate; D013450:Sulfones; D016896:Treatment Outcome
chemical_list: D004791:Enzyme Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate