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 Cialis (tadalafil): This ED medication works with the same principle as Viagra, but lasts up to 36 hours. It’s available Cialis Daily.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. Where can I get a blood pressure BP reading? Never purchase ED medications from a site or service that doesn’t require a prescription and medical documentation. Patients should always ask their doctors for medical advice about adverse events. A phone or video consultation is sometimes required for legal purposes. Cialis tadalafil : This ED medication works with the same principle as Viagra, but lasts up to 36 hours. Taking generic ED medications is an effective way to save money without sacrificing quality.CHOOSE BRAND-NAME VIAGRA. The original little blue pill prescribed by doctors for over 20 years. Clinically proven to treat men with erectile dysfunction (ED) Ongoing commitment to product quality and safety monitoring. Generic sildenafil is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower. Get sildenafil for as low as $, which is 95% off the average retail price of $ for the most common version, by . According to price-comparison site , generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with more than $50 per.The products discussed in this site may have different product labeling in different countries. Now, the Drug Enforcement Agency DEA has proposed new rules that will require an in-person visit for anything more than a day supply of controlled substances to be filled by an online pharmacy. Insurance: If you plan to use insurance, make sure the online provider accepts it. Just visit a participating pharmacy. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. It depends on the platform and insurance provider.