One option is to consider generic versions of brand-name medications. Research has shown that abnormal levels of these hormones, either too high or too low hypothyroidism or hyperthyroidism , is related to erectile dysfunction [9]. If you’re not sure if you’re taking a nitrate, ask your doctor or pharmacist. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss. It is recommended to take vardenafil on an empty stomach for optimal results. It can be dangerous to take sildenafil if you also take medicines called nitrates often given for chest pain. Shipping is fast, free, and discreet.Optum Store Sildenafil If you are experiencing the symptoms of erectile dysfunction (ED), you may have considered using Viagra or a similar ED medication as a possible . 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 . VIAGRA can cause your blood pressure to drop suddenly to an unsafe level if taken with certain other medicines. Do not take VIAGRA if you take any other medicines called “nitrates.” Nitrates are used to treat chest pain (angina). A sudden drop in blood pressure can cause you to feel dizzy, faint, or have a heart attack or stroke.