Heparin is injected under the skin or as an infusion into a vein. A healthcare provider will give your first dose and may teach you how to properly use the medication by yourself.
Follow all directions on your prescription label and read all medication guides or instruction sheets. Your doctor may occasionally change your dose. Use the medicine exactly as directed.
Read and carefully follow any Instructions for Use provided with your medicine. Ask your doctor or pharmacist if you don't understand all instructions.
Prepare an injection only when you are ready to give it. Do not use the medicine if it has changed colors or has particles in it. Call your pharmacist for new medicine.
Do not use a prefilled syringe when giving this medicine to a child. The prefilled syringe contains more than a child's dose of heparin.
Heparin increases your risk of bleeding, which can be severe or life-threatening. You will need frequent tests to measure your blood-clotting time. The timing of these tests is very important in helping your doctor determine whether it is safe for you to continue using this medicine.
If you need surgery, dental work, or a medical procedure, tell the care provider ahead of time that you are using heparin.
Store at room temperature away from moisture and heat.
Use a needle and syringe only once and then place them in a puncture-proof "sharps" container. Follow state or local laws about how to dispose of this container. Keep it out of the reach of children and pets.
You may be switched from injectable heparin to an oral (taken by mouth) blood thinner. Do not stop using the injection until your doctor tells you to. You may need to use both the injection and the oral forms for a short time.
 Detailed Heparin dosage information
What happens if I miss a dose?
Call your doctor for instructions if you miss a dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include easy bruising, nosebleeds, blood in your urine or stools, black or tarry stools, or any bleeding that will not stop.
