 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  of blood clots (such as hip fracture, abdominal, knee/hip replacement).Fondaparinux is known as a "blood thinner" (anticoagulant). It is a drug similar to heparin that works by blocking certain natural substances in the blood that cause clotting. How to use Fondaparinux SODIUM Syringe Read the Patient Information Leaflet if available from your pharmacist before you start using fondaparinux and each time you get a refill. If you have any questions, ask your doctor or pharmacist. This medication is given by injection under the skin of the stomach/abdomen as directed by your doctor, usually once daily. Do not inject into a muscle. The dosage and length of treatment are based on your medical condition and response to treatment. The dosage may also be based on your weight. Use this medication regularly to get the most benefit from it. To help you remember, use it at the same time each day. If you are using this medication at home, learn all preparation and usage instructions from your health care professional and the product package. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Do not mix any other </s>