Answer
The most commonly reported serious adverse reactions to fondaparinux sodium are bleeding complications at various sites, including rare intracranial/intracerebral and retroperitoneal bleeding, and anaemia.
Sources for this answer
- Arixtra 2.5 mg/0.5 ml solution for injection, pre-filled syringeViatris (formerly Mylan or Upjohn) · emc · SmPC §4.8 Undesirable effects · Version 7Document updated
Sources checked