Finally, we checked customer reviews to better understand user experiences with each platform. These medicines are called PDE5 inhibitors. Insurance: If you plan to use insurance, make sure the online provider accepts it. Privacy: Confirm that your personal data and payment details are confidential. An erection results from an increase in blood flow to the penis.Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body . Best Low Cost: GoodRx Fastest Delivery: Blink Health: Sesame Sign Up Now Key Specs Cost: Consultation prices vary based on the prescriber; $5 generic . Published on October 18, warning This article is no longer being updated and some information may not be current. Visit the GoodRx Healthhomepage for our latest articles. .