Print | AAA

Safety and Side Effects

Save on Effient

Get a FREE 30-Day Trial offer or Co-Pay Card now.

You can also take advantage of our Esstential Habits® program, designed to help you:

  • Work with your doctor
  • Set realistic goals
  • Eat healthier and be more active

See a Stent
Up Close

Use the
Stent 360 tool.

Effient® (prasugrel) increases your risk of bleeding because it lessens the ability of your blood to clot. For information on bleeding and other potential side effects, please click the subjects from the list below.

The most important information about Effient.

  • Effient is used to lower your chance of having a heart attack or other serious problems with your heart or blood vessels. But Effient can cause bleeding, which can be serious, and sometimes lead to death. You should not start to take Effient if it is likely that you will have heart bypass surgery (coronary artery bypass graft surgery, or CABG) right away. You have a higher risk of bleeding if you take Effient and then have heart bypass surgery.
  • Do not take Effient if you:
    • Currently have abnormal bleeding, such as stomach or intestinal bleeding, or bleeding in your head
    • Have had a stroke or "mini-stroke" (also known as transient ischemic attack or TIA)
    • Are allergic to prasugrel or any of the ingredients in Effient. See the Medication Guide for a list of the ingredients in Effient
  • Get medical help right away if you think you may be having a stroke or TIA. Symptoms that you may be having a stroke or TIA include:
    • sudden slurring of speech
    • sudden weakness or numbness in one part of your body
    • sudden blurry vision or sudden severe headache
  • If you have a stroke or TIA while taking Effient, your doctor will probably stop your Effient. Follow your doctor's instructions about stopping Effient. Do not stop taking Effient unless your doctor tells you to
  • Before having any surgery you should talk to your doctor about stopping Effient. If possible, Effient should be stopped at least 1 week (7 days) before any surgery, as instructed by the doctor who prescribed Effient for you

Risk factors for bleeding when taking Effient.

You may also have a higher risk of bleeding if you take Effient and you:

  • Have had trauma, such as an accident or surgery
  • Have stomach or intestine bleeding that is recent or keeps coming back, or you have a stomach ulcer
  • Have severe liver problems
  • Have moderate to severe kidney problems
  • Weigh less than 132 pounds
  • Take other medicines that increase your risk of bleeding, including:
    • Warfarin sodium (Coumadin, Jantoven)
    • A medicine that contains heparin
    • Other medicines to prevent or treat blood clots
    • Regular, daily use of nonsteroidal anti-inflammatory drugs (NSAIDs)

Tell your doctor if you take any of these medicines. Ask your doctor if you are not sure if your medicine is one listed above.

Signs and symptoms of bleeding.

  • Effient increases your risk of bleeding because it lessens the ability of your blood to clot. While you take Effient:
    • You will bruise and bleed more easily
    • You are more likely to have nose bleeds
    • It will take longer for any bleeding to stop
  • Call your doctor right away if you have any of these signs or symptoms of bleeding:
    • Unexpected bleeding or bleeding that lasts a long time
    • Bleeding that is severe or you cannot control
    • Pink or brown urine
    • Red or black stools (looks like tar)
    • Bruises that happen without a known cause or get larger
    • Cough up blood or blood clots
    • Vomit blood or your vomit looks like "coffee grounds"
  • Do not stop taking Effient without talking to the doctor who prescribes it for you. People who are treated with angioplasty and have a stent, and stop taking Effient too soon, have a higher risk of a blood clot in the stent, having a heart attack or dying. If you must stop Effient because of bleeding, your risk of a heart attack may be higher.

Possible side effects other than bleeding.

Effient can cause serious side effects, including:
  • See "What is the most important information I should know about Effient?"
  • A blood clotting problem called Thrombotic Thrombocytopenic Purpura (TTP). TTP can happen with other medicines that are like Effient, sometimes after a short time (less than 2 weeks). TTP is a blood clotting problem where blood clots form in blood vessels and can happen all over the body. TTP needs to be treated in a hospital right away, because you may die. Get medical help right away if you have any of these symptoms and they cannot be explained by another medical condition:
    • Purplish spots called purpura on the skin or mucous membranes (such as on the mouth) due to bleeding under the skin
    • Paleness or jaundice (a yellowish color of the skin or eyes)
    • Feeling tired or weak
    • Fever
    • Fast heart rate or feeling short of breath
    • Headache, speech changes, confusion, coma, stroke or seizure
    • Low amount of urine, or urine that is pink-tinged or has blood in it
    • Stomach area (abdominal) pain, nausea, vomiting or diarrhea
    • Visual changes
  • Serious allergic reactions can happen with Effient, or if you have had a serious allergic reaction to the medicines clopidogrel (Plavix®) or ticlopidine (Ticlid®). Get medical help right away if you get any of these symptoms of a severe allergic reaction while taking Effient:
    • Swelling or hives on your face, lips, in or around your mouth or throat
    • Trouble breathing or swallowing
    • Chest pain or pressure
    • Dizziness or fainting

Tell your doctor if you have any side effect that bothers you or that does not go away. These are not all of the possible side effects of Effient. For more information, ask your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

What you should tell your doctor before taking Effient.

Tell your doctor about all of your medical conditions. Effient may not be right for you if you:
  • Have any bleeding problems
  • Have had a stroke or "mini-stroke" (also known as transient ischemic attack or TIA)
  • Are allergic to any medicines, including clopidogrel (Plavix®) or ticlopidine hydrochloride (Ticlid®)
  • Have a history of stomach ulcers, colon polyps or diverticulosis
  • Have liver problems
  • Have kidney problems
  • Have had any recent severe injury or surgery
  • Plan to have surgery or a dental procedure. See "What is the most important information I should know about Effient?"
  • Are pregnant or are planning to get pregnant. It is not known if Effient will harm your baby
  • Are breastfeeding. It is not known if Effient passes into your breast milk. You and your doctor should decide if you will take Effient or breast-feed. You should not do both without talking with your doctor

Tell all of your doctors and dentists that you are taking Effient. They should talk to the doctor who prescribed Effient for you before you have any surgery or invasive procedure.

Tell your doctor about all the medicines you take, including prescription and nonprescription medicines, vitamins and herbal supplements. Certain medicines may increase your risk of bleeding. See "What is the most important information I should know about Effient?"

Know the medicines you take. Keep a list of them and show it to your doctor and pharmacist when you get a new medicine.

Potential drug interactions.

Your risk of bleeding while taking Effient may be higher if you also take other medicines that increase your risk of bleeding, including:
  • Warfarin sodium (Coumadin®, Jantoven®)
  • A medicine that contains heparin
  • Other medicines to prevent or treat blood clots
  • Regular daily use of non-steroidal anti-inflammatory drugs (NSAIDs)

Tell your doctor about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements. Certain medicines may increase your risk of bleeding. See "What is the most important information I should know about Effient?" Know the medicines you take. Keep a list of them and show it to your doctor and pharmacist when you get a new medicine.