Overview To Determine How Different Doses of Tadalafil Work on Getting and Keeping an Erection 26 or 36 Hours After Taking Status: Completed Trial end date: 2003-09-01 Target enrollment: Participant gender: Summary Study to see how effective different doses of tadalafil are for getting and keeping an erection when sex is attempted after a certain number of hours. Phase: Phase 3 Details Lead Sponsor: Eli Lilly and CompanyCollaborator: ICOS CorporationTreatments: Tadalafil