Get emergency medical help if you have signs of an allergic reaction to Effient: hives; dizziness, chest pain, difficulty breathing; swelling of your face, lips, tongue, or throat.
Prasugrel increases your risk of bleeding, which can be severe or life-threatening.
Call your doctor at once if you have:
a light-headed feeling, like you might pass out;
any bleeding that will not stop;
pink or brown urine;
signs of a serious blood-clotting problem - pale skin, purple spots under your skin or on your mouth, fever, fast heart rate, weakness, stomach pain, trouble breathing, jaundice (yellowing of the skin or eyes);
signs of stomach bleeding - bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds; or
signs of a stroke - sudden numbness or weakness (especially on one side of the body), sudden severe headache, slurred speech, problems with vision or balance.
The risk of bleeding is higher in older adults.
Common Effient side effects may include:
nosebleeds; or
easy bruising or bleeding.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Effient side effects (more detail)
