Fondaparinux (fondaparinux sodium) — Uses, Dosage, Side Effects & Safety

Drug class: Anticoagulant (Selective Factor Xa Inhibitor)

Overview

Fondaparinux is a prescription anticoagulant (blood thinner) used to prevent and treat blood clots in the veins, such as deep vein thrombosis (DVT) and pulmonary embolism (PE). It is also used to prevent blood clots after certain types of surgeries, such as hip or knee replacement. Fondaparinux works by blocking a specific clotting factor in the blood called Factor Xa. By inhibiting this factor, fondaparinux helps prevent the formation of harmful blood clots without directly affecting platelets. Key points for patients: Fondaparinux is given as a once-daily injection under the skin. It is important to use it exactly as prescribed and not to skip doses. Patients should watch for signs of bleeding and report any unusual bruising or bleeding to their healthcare provider.

Therapeutic uses

  • Prevention of deep vein thrombosis (DVT) in patients undergoing orthopedic surgery (e.g., hip fracture surgery, hip replacement surgery, knee replacement surgery)
  • Prevention of deep vein thrombosis (DVT) in patients undergoing abdominal surgery who are at risk for thromboembolic complications
  • Treatment of acute deep vein thrombosis (DVT)
  • Treatment of acute pulmonary embolism (PE)

Common side effects

  • Bleeding
  • Anemia
  • Thrombocytopenia
  • Injection site reactions
  • Rash
  • Hypokalemia
  • Liver enzyme elevations

Frequently Asked Questions about Fondaparinux

What is fondaparinux used for?

Fondaparinux is used to prevent and treat blood clots in the veins, such as deep vein thrombosis (DVT) and pulmonary embolism (PE), and to prevent clots after certain surgeries.

How is fondaparinux given?

Fondaparinux is given as a subcutaneous injection (under the skin), usually once daily. It is not taken by mouth.

What should I do if I miss a dose?

Take the missed dose as soon as you remember on the same day. If it is almost time for your next dose, skip the missed dose. Do not double up doses.

What are the signs of serious side effects?

Serious side effects include severe bleeding, black or tarry stools, red or brown urine, sudden severe headache, or signs of spinal cord problems (numbness, weakness). Seek medical help immediately if these occur.

Can I use fondaparinux if I have kidney problems?

Fondaparinux should not be used in patients with severe kidney impairment (creatinine clearance

Is fondaparinux safe in pregnancy?

Fondaparinux should only be used in pregnancy if clearly needed and prescribed by your doctor, as safety data are limited.

Can fondaparinux be reversed if I have bleeding?

There is no specific antidote for fondaparinux. Severe bleeding is managed with supportive care and blood products as needed.

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