CIALIS (TADALAFIL)

is a Vasodilator. Cialis treats Erectile Dysfunction and Enlarged Prostate (Benign Prostatic Hyperplasia) It can also treat high blood pressure in the Lungs (Pulmonary Arterial Hypertension).

5 - 20mg is the recommended dose. 

Onset: 2 - 4 hours

Duration: 18 -36 hours

LEVITRA (VARDENAFIL)

is a Vasodilator. Levitra treats Erectile Dysfunction.

20mg is the recommended dose.

Onset: 30 - 60 minutes 

Duration: 4 - 6 hours 

VIAGRA (Sildenafil) 

is a Vasodilator. Viagra treats Erectile Dysfunction, it can also treat high blood pressure in the lungs (Pulmonary Arterial Hypertension)

20-100mg is the recommended dose.

Onset: 30 - 60 minutes

Duration: 4 hours