Tadalafil (cialis) for erectile dysfunction.
D002243:Carbolines / Q000008:administration & dosage / Q000627:therapeutic use*; D003075:Coitus / Q000502:physiology; D018849:Controlled Clinical Trials as Topic; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D008297:Male; D010410:Penile Erection / Q000187:drug effects; D010919:Placebos; D000068581:Tadalafil; D016896:Treatment Outcome
D002243:Carbolines; D010919:Placebos; D000068581:Tadalafil