A Study for Patients With Erectile Dysfunction to Test Whether Tadalafil Taken Once a Day Can Better Improve Psychological Outcomes.
Conditions
Interventions
- DRUG: tadalafil once a day [T(OaD)]
- DRUG: sildenafil citrate as needed [S(PRN)]
- DRUG: tadalafil as needed [T(PRN)]
Sponsor
Eli Lilly and Company