The purpose of this study is to investigate if treatment in erectile dysfunction with a
long-acting drug (Tadalafil) taken once a day or taken as needed results in a longer
treatment adherence and better long term outcomes (over 24 weeks), compared with a
short-acting drug (Sildenafil Citrate) taken as needed.
Minimum age: 18 Years.
Maximum age: N/A.
Gender(s): Male.
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