It might work longer if you have mild to moderate erectile dysfunction. This boosts blood flow and helps you get an erection from sexual activity. Avanafil Stendra. Oral medicines for ED usually work well and cause few side effects. A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow.Sildenafil is a medicine used to treat erection problems (erectile dysfunction). Sildenafil is also sometimes used to treat pulmonary hypertension (high blood pressure in the . Viagra is a brand-name prescription drug that’s approved to treat erectile dysfunction (ED). With ED, you’re unable to have or maintain an erection. Viagra is approved for this use . Viagra treats erectile dysfunction (ED) in adults. It’s usually taken about 1 hour before sexual activity. Below, you’ll find information about recommended dosages and how to .