The specific process for getting ED pills online depends on your chosen provider. 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. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. Finding an online ED provider can feel overwhelming. More serious side effects may include a drop in blood pressure or an erection that lasts longer than four hours.Here’s what to look for when you buy ED drugs online: A licensed pharmacy with an address in the U.S. (Check with your state board of pharmacy or the National Association of Boards of. Depending on your symptoms and needs, you may be prescribed Viagra, sildenafil, Cialis, tadalafil, Stendra, paroxetine, or a combination of tadalafil and sildenafil, available as mints or pills. Prices range from $3 to $ per dose or $82 to $ for a monthly supply, depending on the medication. Get a Savings Card Sign up for a Savings Card and, if eligible, you may save 50% on up to 12 prescriptions of brand-name VIAGRA per year.* * Terms and conditions apply. Check Your Pills Check your pills to be sure they’re brand-name VIAGRA—not the generic.