No generic version of the medication is available because the manufacturer still holds an active patent for the active ingredient, avanafil. This should decrease the risk of contact dermatitis reactions. After your questionnaire, any and all communications with your consulting physician occur through the Hims messaging platform, with most questions receiving answers within 24 hours. We offer this popular ED treatment at a fraction of the brand name price. Their sister brand, Hers, was added a year later. These side effects include chest pain and sudden loss of vision, hearing loss and in some cases, allergic reaction. It also has a low risk of side effects and is well tolerated compared to Viagra, sildenafil, Cialis, and tadalafil, which makes it accessible for men who may not be able to take the other medications.Viagra ® is a brand-name medication developed by the biopharmaceutical company Pfizer. Sildenafil, or generic Viagra ®, is the active ingredient in Viagra ® and . Viagra®, a brand-name ED drug created by Pfizer, is the original drug in the PDE5 inhibitor class of medications and is very effective in treating erectile dysfunction. Viagra® can .  · Hims now offers a sildenafil chew at different dosages allowing you to take sildenafil as-needed to suit your sex life. Based on the effectiveness and ability to .