This site is intended only for U. Some people may also have ringing in their ears tinnitus or dizziness. Yes, usually. More serious side effects may include a drop in blood pressure or an erection that lasts longer than four hours. Never purchase ED medications from a site or service that doesn’t require a prescription and medical documentation. While each PDE5 inhibitor differs slightly, they’re very similar in treating erectile dysfunction. Methodology We researched 19 online platforms for erectile dysfunction treatment to learn more about the process of ordering ED pills online.Viagra (sildenafil) is a brand-name prescription drug that’s used to treat erectile dysfunction (ED). Learn about side effects, warnings, dosage, and more. 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 . You can purchase medications like birth control, men’s hair loss products, Latisse eyelash growth serum, and ED medications, including Viagra, which are delivered right to your .