We considered cost, medications available, and whether generic versions were offered to help reduce costs. Erectile dysfunction impotence is the inability to get and keep an erection firm enough for sex. Whether you’re looking for answers for yourself or for someone you love, we’re here to give you the best information available. Finally, we checked customer reviews to better understand user experiences with each platform. Those who don’t feel comfortable discussing ED with an in-person provider or lack time to visit a doctor’s office may find online ED prescriptions beneficial.High doses of Viagra have been connected to temporary vision issues, reports the American Academy of Ophthalmology. But overall, the medication is considered low risk when . About 80% of people who use the device correctly get an erection hard enough for sex. Some of these products have been found to contain sildenafil (the active ingredient in . Mayo Clinic Explains Erectile Dysfunction From an accredited US hospital Show transcript Flaccid and erect penis Enlarge image Erectile dysfunction (impotence) is the inability to .