Answer: Not always. Most erectile dysfunction medications belong to the drug class known as PDE5 inhibitors , which help relax the muscles and increase blood flow to allow for a full erection. This allows the smooth muscles in the penis to relax and fill with blood. Data shared with Viatris will be aggregated and de-identified; it will be combined with data related to other Savings Offer redemptions and will not identify you Viatris reserves the right to rescind, revoke, or amend this Savings Offer without notice No membership fees. This helps blood flow into your penis more easily, and helps you get firmer erections that last for longer. The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire.Most popular Low price Walmart $ retail Save 99% $ One-time offer Get free savings Walgreens $1, retail Save 99%. 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. Viagra, Cialis, sildenafil, tadalafil: Yes: Lemonaid Best for Cialis: Starting at $2 to $8 per.