Consumer Reports Best Buy Drugs shares how you might be able to get Viagra and the drug Revatio, which is a lower dose than Viagra and. Revatio (sildenafil) is a prescription medication used to treat adults with pulmonary arterial hypertension or PAH. Pulmonary arterial hypertension means that this blood vessel has difficulty pushing blood to the lungs because of high blood pressure. Sildenafil is the same. Buy Revatio In New York No Prescription Revatio. Revatio is usually taken three times daily, approximately 4 to 6 hours apart. It can be taken with or without food .