Don’t ignore stress, anxiety or other mental health concerns. Medicines that you take by mouth are called oral medicines. When did you first begin noticing sexual problems? Work through relationship issues. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider.Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including online. If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in adult males* with ED. With ED, you have trouble getting . 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 .