Caverject, also known by its generic name alprostadil, is a medication primarily used in the treatment of erectile dysfunction (ED). It belongs to a class of drugs known as vasodilators, which work by expanding blood vessels to increase blood flow. Caverject is unique in its administration as it is directly injected into the penis, leading to an erection by facilitating increased blood flow. This medication can also be used in newborns with certain types of congenital heart defects to help maintain an open ductus arteriosus until surgery can be performed. Caverject is known for its rapid onset of action, making it a preferred choice for those seeking immediate results. However, it is important for users to be aware of potential side effects and to follow the prescribed dosage and administration guidelines carefully.