Drugs to enlarge the corpus cavernosum are generally unscientific. The main body of the male penis consists of the corpus cavernosum of the penis, each corpus cavernosum is covered with a thick layer of fibrous membrane, called the cavernous membrane, male in the sexual stimulation, the volume of the corpus cavernosum will increase to fill the cavernous membrane, the cavernous membrane will be fully stretched and taut, the penis will be completed erection. After puberty, the corpus cavernosum and cavernous leucomembrane are basically mature and will not develop again. There is no medication that can make the corpus cavernosum grow, and the method of increasing the corpus cavernosum with medication is unscientific, and the corpus cavernosum of the penis in adult males can’t develop twice. The size of the male corpus cavernosum is related to genetics and his own constitution, and will not be changed by the subsequent use of drugs.