Such patients must not apply any out-of-pocket expenses incurred using this Savings Offer toward any government insurance benefit out-of-pocket spending calculations, such as Medicare Part D true out-of-pocket TrOOP costs You are responsible for reporting use of this Savings Offer to any private insurer, health plan, or other third party who pays for or reimburses any part of the prescription filled using this Savings Offer, as may be required. While in some cases the condition may improve over time, it can also be permanent. If you have an erection that lasts more than 4 hours, get medical help right away. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss. Always seek the advice of your physician or other qualified health providers with any questions you may have regarding a medical condition.Sildenafil belongs to a group of medications called phosphodiesterase type 5 inhibitors. It is used for the treatment of erectile dysfunction (male impotence). It helps to achieve and keep an erection sufficient for sexual activity. It does this by allowing a greater blood flow into the penis when a man is sexually aroused. Brand-name vs. generic. Reducing long-term drug costs. Financial assistance. Next steps. Viagra (sildenafil) is a brand-name oral tablet prescribed for erectile dysfunction. The . It depends on a few factors, including your age and why you’re taking it, since Viagra is not only used to treat ED. Your doctor will tell you how much you should take. For help with erections.