side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using alprostadil and call your doctor at once if you have any of these serious side effects:
feeling light-headed, fainting;
bleeding from your urethra;
bleeding, bruising, or swelling where you injected the medication;
a painful erection that lasts 4 hours or longer;
severe pain or irritation of your penis or urethra; or
redness, lumps, tender.
