Heparin - injection
Heparin - injection
This medication is used to prevent and treat blood clots. It may be used to prevent and treat blood clots in the lungs/legs (including in patients with atrial fibrillation). It may be used to treat certain blood clotting disorders. It may also be used to prevent blood clots after surgery, during dialysis, during blood transfusions, when collecting blood samples, or when a person is unable to move for a long time. Heparin helps to keep blood flowing smoothly by making a certain natural substance in your body (anti-clotting protein) work better. It is known as an anticoagulant.
This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.
This drug may also be used to reduce the risk of blood clots in people who have had certain types of heart attack, or who have a certain type of chest pain called unstable angina.
Read the Patient Information Leaflet if available from your pharmacist before you start using heparin and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
This medication is given by injection into a vein or under the skin as directed by your doctor. Do not inject this medication into a muscle. The dosage and how often you use it are based on your medical condition, weight, and response to treatment.
Heparin comes in many strengths. Serious (sometimes fatal) injuries have occurred when the wrong strength was used. Check that you are using the correct strength and dose before injecting this medication.
If you are injecting heparin into a vein, flush the catheter/line with normal saline before and after infusing drugs that interact with heparin such as doxorubicin, droperidol, ciprofloxacin, and mitoxantrone.
If you are injecting heparin under the skin, clean the injection site with rubbing alcohol. Change the injection site each time to lessen injury under the skin.
If you are giving this medication to yourself at home, learn all preparation and usage instructions from your health care professional. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Learn how to store and discard medical supplies safely.
Use this medication regularly to get the most benefit from it. To help you remember, use it at the same times each day.
Your doctor may direct you to switch to an anticoagulant taken by mouth (such as warfarin). Use this medication and any new medication exactly as directed by your doctor.
Mild pain/redness/irritation at the injection site may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including:
This medication can cause bleeding if its effect on your clotting proteins is too much. Tell your doctor right away if you develop any signs of serious bleeding, including unusual pain/swelling/discomfort, prolonged bleeding from cuts or gums, persistent nosebleeds, unusually heavy/prolonged menstrual periods, unusual/easy bruising, dark urine, black stools, severe headache, unusual dizziness.
Some patients can have certain bad reactions to heparin (heparin-induced thrombocytopenia-HIT or heparin-induced thrombocytopenia and thrombosis-HITT). This can occur during treatment and up to several weeks after treatment with heparin has stopped.
Get medical help right away if you have any very serious side effects, including:
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including:
In the US -
Before using heparin, tell your doctor or pharmacist if you are allergic to it; or to pork products; or if you have any other allergies. This product may contain inactive ingredients (such as benzyl alcohol found in some brands), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of:
To lower the chance of getting cut, bruised, or injured, use caution with sharp objects like razors and nail cutters, and avoid activities such as contact sports.
This medicine may cause stomach bleeding. Daily use of alcohol while using this medicine will increase your risk for stomach bleeding. Limit alcoholic beverages. Ask your doctor or pharmacist about how much alcohol you may safely drink.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
This medication contains sodium. Consult your doctor or pharmacist if you are on a salt-restricted diet or if you have a condition that could worsen if you have more salt (such as congestive heart failure).
Older adults, especially women over 60 years of age, may be more sensitive to the side effects of this drug, especially bleeding.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
This medication does not pass into breast milk. Consult your doctor before breast-feeding.
See also How to Use section.
Some products that may interact with this drug include:
This medication is sometimes used together with other drugs that have "blood thinning" or anti-platelet effects such as aspirin, clopidogrel, or warfarin. If your doctor prescribes a combination of these drugs, he or she will monitor you closely to minimize your risk of bleeding. Keep all medical and laboratory appointments.
Check all prescription and nonprescription medicine labels carefully since many medications contain pain relievers/fever reducers (NSAIDs such as ibuprofen, naproxen, or aspirin) that can increase the risk of bleeding when used with heparin. However, if your doctor has directed you to take low-dose aspirin to prevent heart attack or stroke (usually at dosages of 81-325 milligrams a day), you should continue taking the aspirin unless your doctor instructs you otherwise. Ask your doctor or pharmacist for more details.
Cigarette smoking decreases blood levels of this medication. Tell your doctor if you smoke or if you have recently stopped smoking.
This medication may interfere with certain laboratory tests (including certain liver function tests, prothrombin time), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: easy/unusual bruising, easy/unusual bleeding such as persistent nosebleeds, blood in urine, black stools.
Do not share this medication with others.
Laboratory and/or medical tests (such as hematocrit, complete blood count, platelet counts, activated partial thromboplastin time, test for blood in stool) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
For the best possible benefit, it is important to receive each scheduled dose of this medication as directed. If you miss a dose, contact your doctor or pharmacist right away to establish a new dosing schedule. Do not double the dose to catch up.
Consult the product instructions and your pharmacist for storage details. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Your condition can cause complications in a medical emergency. For information about enrolling in MedicAlert, call 1-888-633-4298 (US) or 1-800-668-1507 (Canada).
Information last revised April 2018.
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