Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient. Your doctor will tell you not to take sildenafil if you are taking street drugs containing nitrates. In a study of healthy male volunteers, co-administration of sildenafil at steady state 80 mg t. Men with untreated ED had relatively low baseline scores for all aspects of sexual function measured again using a 5-point scale in the IIEF. Keep out of the reach of children.AdShop Forhims Online for Great Prices at Store Sale & Clearance. Up To 60% Off Forhims Official Sale.  · Viagra; Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where . Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the .