Revatio 20 mg is a medication that contains sildenafil as the active ingredient. Revatio 20 mg is used to treat erectile dysfunction (impotence) in males. You may purchase revatio 20 mg from our online pharmacy at a low cost and receive hassle-free overnight delivery. Revatio 20 mg works by relaxing and broadening the blood vessels in the penile area, hence increasing blood flow to the penis. This helps males achieve an erection. This medication is also prescribed to treat pulmonary hypertension. Men over the age of 18 are normally encouraged to use this medication.