And not all online pharmacies have the capability to safely ship medications that need to be temperature-controlled, such as insulin. Online ED consultations offer privacy, convenience, and affordability while allowing you to quickly get the medications you need—the same day, with some services. Can you buy Viagra over the counter? Oral medicines for ED usually work well and cause few side effects. Medicines that block an enzyme called CYP3A4. This boosts blood flow and helps you get an erection from sexual activity. Both options require valid medical documentation, but some online services only require a health questionnaire to be filled out and reviewed for approval—meaning no face-to-face video interaction is needed.Popular ED medications found online include: Viagra (sildenafil): As the first FDA-approved PDE5. Consumer Reports Best Buy Drugs shares how you might be able to get generic Viagra, known as sildenafil, at a much lower price. When samples of milligram Viagra tablets purchased online were tested, only 10% were even close to the advertised strength. When you buy from an unknown company, .