title: Third drug for impotence.
mesh_terms: D002243:Carbolines / Q000627:therapeutic use*; D000075202:Contraindications; D004347:Drug Interactions; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D008297:Male; D000068581:Tadalafil
chemical_list: D002243:Carbolines; D000068581:Tadalafil