title: [Sildenafil (Viagra)].
authors.affiliation: Clinical Research and Biometrix, Pfizer Pharmaceuticals Inc., Tokyo, Japan. itomasa@pfizer.co.jp
authors.forename: M
authors.initials: M
authors.lastname: Ito
authors.forename: M
authors.initials: M
authors.lastname: Suzuki
mesh_terms: D002986:Clinical Trials as Topic; D015195:Drug Design; D007172:Erectile Dysfunction / Q000188:drug therapy; D006801:Humans; D008297:Male; D009126:Muscle Relaxation / Q000187:drug effects; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D009569:Nitric Oxide / Q000502:physiology; D010726:Phosphodiesterase Inhibitors / Q000494:pharmacology / Q000627:therapeutic use; D010879:Piperazines / Q000494:pharmacology / Q000627:therapeutic use; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones
chemical_list: D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D009569:Nitric Oxide; D000068677:Sildenafil Citrate