Drugs Home > Fondaparinux

Fondaparinux is prescribed to treat and prevent blood clots. This blood thinner works by slowing down clot formation, allowing the body to break down the clots naturally. Before using this medication, tell your healthcare provider if you have any allergies, a bleeding disorder, or high blood pressure. Also, make sure your healthcare provider is aware of all other medicines you are taking, including nonprescription drugs.

What Is Fondaparinux?

Fondaparinux sodium (Arixtra®) is a prescription medication approved to prevent and treat blood clots. It is taken by injection just below the skin.
(Click What Is Fondaparinux Used For? for more information, including possible off-label uses.)

Are There Side Effects?

As with any medicine, fondaparinux may cause side effects. However, not everyone who takes the drug will experience side effects. In fact, many people tolerate it quite well.
If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider. Serious side effects are less common, but do sometimes occur.
Some of the common side effects of this medication include:
  • Bleeding
  • Skin reactions.
(Click Side Effects of Fondaparinux to learn more, including potentially serious side effects you should report immediately to your healthcare provider.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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