You can buy it from a store-based pharmacy or reputable online pharmacy with a prescription. Your doctor will tell you not to take sildenafil if you are taking street drugs containing nitrates. This medicine has been approved in the United States to treat premenopausal females who have low sexual desire. By controlling the enzyme, sildenafil helps to maintain an erection after the penis is stroked. Shake the liquid well for 10 seconds before each use to mix the medication evenly. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. This is a type of high blood pressure that occurs between the heart and the lungs.Get sildenafil for as low as $, which is 95% off the average retail price of $ for the most common version, by using a GoodRx coupon. Prices Medicare Drug Info Side Effects Images Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in men. Key facts. Sildenafil (Viagra) is a medicine used to treat erectile dysfunction (ED, also called impotence). Sildenafil works by helping to relax the blood vessels in the penis, allowing more blood to flow in and cause an erection. You should take sildenafil about an hour before planned sexual activity, so it has time to work. Side Effects. Dizziness, headache, flushing, or stomach upset may occur. Vision changes such as increased sensitivity to light, blurred vision, or trouble telling blue and green colors apart may.
