Viridal belongs to a group of medicines called prostaglandins. Viridal contains the active ingredient alprostadil. Alprostadil is similar to prostaglandin E, (PGE), that occurs naturally in the body. The medicine works by widening blood vessels and increasing blood flow to your penis.
Viridal is used to help you get and maintain an erection when you have insufficient PGE. Viridal comes in a glass cartridge with two chambers. One chamber contains alprostadil, the other contains sodium chloride solution. These are mixed together to make a solution that is injected into the penis.
