The only effective treatment for erectile dysfunction, which is characterized by difficulties getting and keeping an erection, is a prescription for cenforce 120 mg. insufficient blood supply to the penis is the cause of erectile dysfunction, a type of sexual dysfunction syndrome. The main component of this drug is sildenafil citrate, which relaxes the muscles surrounding the penis and widens the body's narrow blood vessels. Put another way, this component belongs to the PDE-5 inhibitor class. This drug needs to be taken orally, and a full glass of water needs to be consumed with it. After taking this medication, all males are permitted to stay in bed upright for four to six hours.