People with heart conditions should never take ED medications without consulting a doctor. 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. However, all medications come with risks. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. When taking ED medication, it’s important to follow dispensing directions if you want the drugs to work as designed. Never purchase ED medications from a site or service that doesn’t require a prescription and medical documentation.It’s no longer sold under the brand name Levitra, but it’s available as generic tablets and orally disintegrating tablets (ODTs). Common side effects of vardenafil include headache, flushing, and stuffy test1.rug: amazon. Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil test1.rug: amazon. Men, ages FSA or HSA eligible. Get erectile dysfunction (ED) treatment from an online doctor or NP when you need it. Request a prescription for ED medication like sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra). Amazon Clinic is virtual care on your schedule, from trusted telehealth providers, with upfront pricing.