By controlling the enzyme, sildenafil helps to maintain an erection after the penis is stroked. Seaman to find out if Viagra could be right for you. When hypertension occurs in the lungs, the heart must work harder to pump enough blood through the lungs. Box , Mission, KS If your pharmacy does not participate, you may be able to submit a request for a rebate in connection with this Savings Offer. 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. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly.Further information. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances. Drug Identifier results for . Is Viagra prescribed in dosages of mg, mg, or mg? The highest recommended Viagra dose for treating erectile dysfunction (ED) is mg per day, according to the . Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including online.