Read our editorial process. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects. 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. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take.Warnings Before taking Dosage Side effects Interactions FAQ What is Viagra? Viagra relaxes muscles found in the walls of blood vessels and increases blood flow to particular . Best Low Cost: GoodRx Fastest Delivery: Blink Health: Sesame Sign Up Now Key Specs Cost: Consultation prices vary based on the prescriber; $5 generic prescriptions Medical . Learn More IF YOU CHOOSE BRAND-NAME VIAGRA, MAKE SURE YOU GET THE BRAND NAME Your prescription may have been filled with a generic version instead of .