In addition, consider the information below. There were some reports of headaches and nausea, however. Topicals tend to have a lower risk of side effects compared to oral medications, Dr. Viagra is always taken as needed, usually an hour before having sex. If it is not treated right away, priapism can permanently damage your penis sudden vision loss in one or both eyes. That means eating healthy foods, exercising, getting good sleep, limiting stress, and treating other health conditions that might cause ED, like high blood pressure, heart disease, diabetes, obesity, and low testosterone, Dr. The as-needed dose is usually 10 mg but can range from 5—20 mg.Yes, penile pumps (also known as ED pumps) are over-the-counter devices that work to treat erectile dysfunction (ED), similar to Viagra. Viagra (sildenafil) is usually the first-line therapy for erectile dysfunction in the United States and is . Generic Viagra (sildenafil) is available as a , , , and milligram (mg) pill and in liquid form. It’s meant to be taken as needed — about an hour before sex — but shouldn’t be. AdTake Charge of Your Sexual Health with Our Top-Rated Male Enhancement Products! Reviews and Comparisons Of The Best Male Enhancement Products. See Which Products WorkK+ visitors in the past month.