Heparin (Heparin sodium) — Uses, Dosage, Side Effects & Safety

Drug class: Anticoagulant

Overview

Heparin is an anticoagulant, commonly known as a 'blood thinner.' It is used to prevent and treat blood clots in veins, arteries, or the lungs, such as deep vein thrombosis (DVT), pulmonary embolism (PE), and during certain surgeries or dialysis procedures. Heparin works by enhancing the activity of antithrombin III, a natural protein in your body that helps prevent clot formation. This action slows down the clotting process, reducing the risk of harmful clots but does not dissolve existing clots. Key points: Heparin is usually given by injection in a hospital or clinical setting. It requires careful monitoring to avoid bleeding complications. Always inform your healthcare provider about any other medications or supplements you are taking before starting heparin.

Therapeutic uses

  • Prevention and treatment of venous thromboembolism (deep vein thrombosis and pulmonary embolism)
  • Prevention of clotting in arterial and cardiac surgery
  • Prevention of clotting during hemodialysis and hemofiltration
  • Prevention of clotting in extracorporeal circulation (e.g., cardiopulmonary bypass)

Common side effects

  • Bleeding
  • Thrombocytopenia
  • Osteoporosis (long-term use)
  • Allergic reactions
  • Injection site reactions
  • Hair loss
  • Elevated liver enzymes

Frequently Asked Questions about Heparin

What is heparin used for?

Heparin is used to prevent and treat blood clots in conditions like deep vein thrombosis (DVT), pulmonary embolism (PE), and during surgeries or dialysis to reduce clot risk.

How is heparin given?

Heparin is usually administered by injection, either intravenously (IV) or subcutaneously (under the skin), typically in a hospital or clinical setting.

What are the signs of heparin overdose?

Signs include excessive or uncontrolled bleeding, easy bruising, blood in urine or stool, and severe headache. Seek emergency help if these occur.

Can I take heparin if I am pregnant?

Heparin is considered safer than other anticoagulants during pregnancy, but should only be used under close medical supervision.

What should I do if I miss a dose?

Contact your healthcare provider for instructions. Do not double the next dose to make up for a missed one.

What is heparin-induced thrombocytopenia (HIT)?

HIT is a rare but serious immune reaction to heparin that causes a low platelet count and increases the risk of new blood clots. Immediate medical attention is required if suspected.

Are there foods or activities I should avoid while on heparin?

Avoid activities that may cause injury or bleeding. Discuss with your doctor before taking new medications or supplements, and limit alcohol intake.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.