You’ll also need to fill out a medical questionnaire with answers about your medical history, current medications, and lifestyle habits. You deserve to put ED behind you and to enjoy your sex life. Read more in our editorial policy. Online pharmacies can be broadly categorized as: Mail-order pharmacies are operated by pharmacy benefits managers PBMs on behalf of health insurers or providers. While this may seem like the most comfortable option upfront, we always encourage you to prioritize your safety and wellbeing over convenience. Larger amounts of alcohol are a different story. Headache is the most common, and stuffy nose and facial flushing are quite common too.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, . 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 . 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 .