A newer form of the medicine that dissolves on the tongue might work faster than the pill that you swallow. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Children younger than 1 year of age—Use and dose must be determined by your doctor. Different brands may not work the same way. Medicines that you take by mouth are called oral medicines. There is a problem with information submitted for this request.The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called . · For oral dosage form (tablets): Adults up to 65 years of age—50 milligrams (mg) as a single dose no more than once a day, 1 hour before sexual intercourse. . Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in .
