Viagra is not recommend for patients with hypertension, a history of heart attacks, chest pain, or those who are taking nitrate medications. A vacuum erection device creates a suction which causes blood flow into the penis. When sufficient blood has entered the penis, the patient places a ring at the base of the penis which traps the blood in the penis and maintains the erection. Injections of vasoactive drugs are supplied to the patient in a kit. Prior to sexual activity the drug is injected into the penis using a small needle.
Penile prostheses are devices that are implanted into the penis.
One type of prosthesis consists of cylinders which can be filled with fluid. The patient can control when the cylinders are filled, which results in an erection. The other type of prosthetic implant results in a constantly rigid penis. Loma Linda University.