What is Cialis 20 mg Used for? Cialis is the brand name for tadalafil. Tadalafil is a phosphodiesterase type 5 inhibitor or, if you want less of a mouthful, a PDE5 inhibitor. Cialis is FDA ...

tadalafil 20 mg PRN, or placebo, followed by 6-week drug-free washout and 3-month open-label tadalafil OaD treatment (OLT). The main outcome measures were Changes in Expanded Prostate Cancer Index ...