There may be other brand names for this medicine.
You should not use this medicine if you are allergic to alprostadil or if you have an abnormally formed penis. If you have certain medical problems such as sickle cell anemia, leukemia, or bone marrow tumors then you should not use this medicine. These conditions can increase the risk of having an unwanted erection that can last over 6 hours, which can be dangerous. If your doctor has told you not to have sex, then you should not use this medicine.