|Generic Name||Brand Name|
|acetylsalicylic acid (ASA)||Anacin, Bufferin|
ASA slows the blood's clotting action by reducing the clumping of platelets. Platelets are cells that clump together and help to form blood clots. ASA keeps platelets from clumping together, thus helping to prevent or reduce blood clots.
During a heart attack. Blood clots form in an already-narrowed artery and block the flow of oxygen-rich blood to the heart muscle. When taken during a heart attack, ASA slows clotting and decreases the size of the blood clot that is forming.
After a heart attack. ASA can help prevent a second heart attack. Taken daily, ASA's anti-clotting action helps prevent a first or second heart attack.
For people who are having a heart attack. You can take ASA to help you during a heart attack. After you call 911 or other emergency services, the operator may tell you to chew 1 adult-strength or 2 to 4 low-dose ASA. Or you might be given ASA in the ambulance or emergency room. ASA slows blood clotting. So a blood clot that is causing the heart attack stays smaller.
For people who have had a heart attack. ASA can help prevent a second heart attack.
For people who have never had a heart attack. ASA may reduce your chance of having a heart attack or a stroke if you have certain risk factors, such as diabetes, high blood pressure, high cholesterol, or smoking. If you have a higher risk for a heart attack or stroke, ASA will have even more benefit for you.
Low-dose ASA may also be used by people who have:
But in people with a relatively low risk of developing cardiovascular disease, the benefits of preventive ASA therapy may be outweighed by the increased risk of bleeding problems.
Generic or store brands are as effective as brand-name ASA.
All medicines have side effects. But many people don't feel the side effects, or they are able to deal with them. Ask your pharmacist about the side effects of each medicine you take. Side effects are also listed in the information that comes with your medicine.
Here are some important things to think about:
Call 911 or other emergency services right away if you have:
Call your doctor right away if you have any unusual bleeding, such as:
Common side effects of this medicine include:
See Drug Reference for a full list of side effects. (Drug Reference is not available in all systems.)
For more information about taking daily ASA, see the topic Low-Dose ASA Therapy.
If you have had a heart attack or stroke, your doctor has probably already prescribed ASA for you.
If you do not take ASA, talk to your doctor before you start taking ASA every day.
Medicine is one of the many tools your doctor has to treat a health problem. Taking medicine as your doctor suggests will improve your health and may prevent future problems. If you don't take your medicines properly, you may be putting your health (and perhaps your life) at risk.
There are many reasons why people have trouble taking their medicine. But in most cases, there is something you can do. For suggestions on how to work around common problems, see the topic Taking Medicines as Prescribed.
If you are pregnant, breast-feeding, or trying to get pregnant, do not use any medicines unless your doctor tells you to. Some medicines can harm your baby. This includes prescription and over-the-counter medicines, vitamins, herbs, and supplements. And make sure that all your doctors know that you are pregnant, breast-feeding, or planning to get pregnant.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments. And call your doctor if you are having problems. It’s also a good idea to know your test results and keep a list of the medicines you take.
|Primary Medical Reviewer||Kathleen Romito, MD - Family Medicine|
|Primary Medical Reviewer||E. Gregory Thompson, MD - Internal Medicine|
|Primary Medical Reviewer||Anne C. Poinier, MD - Internal Medicine|
|Specialist Medical Reviewer||Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology|
|Last Revised||July 1, 2011|
Last Revised: April 1, 2012
This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.