Common side effects include headache, facial flushing, indigestion, and dizziness. Generic vs. You’ll also need to fill out a medical questionnaire with answers about your medical history, current medications, and lifestyle habits. This increase in blood flow results in a firmer, longer-lasting erection. Popular ED medications found online include: Viagra sildenafil : As the first FDA-approved PDE5 inhibitor for ED, sildenafil is taken 30 minutes to four hours before sexual intercourse to help achieve and maintain an erection. That’s not to say there aren’t just as many illegitimate sites. Under 25 73 or older Have not had a physical exam in the past 5 years which included a genital exam Any condition where sex is not advised Taking the medicine nitroglycerin or other medicines that contain nitrates Don’t know your blood pressure Low blood pressure or unexplained fainting or dizziness Kidney disease Physical abnormality of the penis, including Peyronie’s disease Your assigned birth sex is female Delivery Services.Amazon Prime members get additional benefits including FREE 2-Day Delivery and low prices on medications. About this medication. VARDENAFIL (var DEN a fil) treats erectile dysfunction (ED). It works by increasing blood flow to the penis, which helps to . Levitra. Used for Erectile Dysfunction. Vardenafil is a first-choice medication for erectile dysfunction (ED). 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 nose. Earn $7 rewards on $30+ select vitamins; BOGO 50% off select Walgreens health & wellness; BOGO 50% off select same-brand cosmetics.