A Study to Evaluate the Efficacy and Safety of 2.5mg and 5mg Tadalafil Given Once a Day to Men With Erectile Dysfunction

A Randomized, Double-Blind, Parallel, Placebo-Controlled Study to Evaluate the Efficacy and Safety of Tadalafil (2.5mg and 5mg) Administered Once Daily to Men With Erectile Dysfunction

This is a multicenter, randomized, double blind, placebo-controlled, parallel design study to evaluate the efficacy and safety of 2.5mg and 5mg tadalafil taken once daily in men with erectile dysfunction.

Inclusion Criteria:

• Men with erectile dysfunction
• At least 18 years of age

Exclusion Criteria:

• Certain chronic medical conditions including cardiac disease, congestive heart failure, kidney or liver disease, cancer and HIV
• A history of certain impotence disorders
• History of specified pelvic surgery
• Any significant genital abnormality identified at the start of the study