What are the side effects of heparin injection?

What are the possible side effects of heparin injection ()? Heparin can cause you to have bleeding episodes while you are using it and for several weeks after you stop. Call your doctor at once if you have easy bruising or unusual bleeding, such as a nosebleed, blood in your urine or stools, black or tarry stools, or any bleeding that will not stop.Get emergency medical help if you have any of these signs of an allergic reaction: nausea, vomiting, sweating, hives, itching, trouble breathing, swelling of your face, lips, tongue, or throat, or feeling like you might pass out..Some people receiving a heparin injection have had a reaction to the infusion (when the medicine is injected into the vein). Tell your caregiver right away if you feel nauseated, light-headed, sweaty, or short of breath during or after a heparin injection.Stop using heparin and call your doctor at once if you have any of these serious side effects:
  • sudden numbness or weakness, especially on one side of the body;
  • sudden severe headache, confusion, problems with vision, speech, or balance;
  • chest pain, sudden cough, wheezing, rapid breathing, fast heart rate;
  • pain, swelling, warmth, or redness in one or both legs;
  • trouble breathing;
  • (in an infant) extreme drowsiness, weakness, or gasping for breath; or
  • fever, chills, runny nose, or watery eyes.
Less serious side effects may include:
  • mild pain, redness, warmth, or skin changes where the medicine was injected;
  • mild itching of your feet; or
  • bluish-colored skin.
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.

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