Rarely reported side effects include: an erection that will not go away priapism. The side effects however, included fainting, vomiting, dizziness and low blood pressure. If this happens, it can put you at serious risk of adverse side effects. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. For more information, you can access the full breakdown of Viagra, Viagra Connect and Kamagra. Vardenafil usually works for 4 to 5 hours.Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum . Oral medicines for ED usually work well and cause few side effects. The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil . Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in adult .
