The following may be useful in answering questions. Alprostadil is a naturally occurring form of the hormone prostaglandin E-1. Injected into the side of the base of the penis, it usually induces erection within 5 to 20 minutes by relaxing smooth muscle and dilating the major blood artery in the penis. Specifically, alprostadil injection is approved for treatment of erectile dysfunction due to neurologic, vascular, psychological or mixed causes. It is also approved for use as an adjunct to other diagnostic tests in the diagnosis of erectile dysfunction.
Dosage is determined in the physician's office.
Most men achieve optimal results with doses of 20 micrograms or less. In general, the lowest possible effective dose should be used. The dose should not exceed 60 micrograms. The product should be used no more than three times per week and no more than once in 24 hours. The first injections must be done in a physician's office by medically trained personnel.