The tablets are in a blister pack made of aluminum foil, which in turn is in a carton box. Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines. If it is not treated right away, priapism can permanently damage your penis sudden vision loss in one or both eyes. In patients with impaired hepatic function there is a decrease in clearance of the active substance tablets eg liver cirrhosis. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily.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 Missing: phone number. MORE expand_more Check your prescription Prescription mg sildenafil (30 tablets) edit Choose your pharmacy moses lake, WA Safeway Walgreens Rite Aid info How to use Missing: phone number. For further information, call , visit , or write: Viatris Inc., P.O. Box , Mission, KS See risks & benefits. Learn more about what VIAGRA® Missing: phone number.