Enoxaparin induced reactive thrombocytosis: a rare adverse drug reaction

Objectives Enoxaparin is a low molecular weight heparin (LMWH), which belongs to the class of anticoagulants. The drug is administered as subcutaneous injection to prevent or treat deep vein thrombosis (DVT), pulmonary embolism and ischemic complications. Case Presentation A 57-year-old women diagnosed with acute coronary syndrome developed reactive thrombocytosis following the administration of enoxaparin subcutaneously. The blood test reports of the patient showed that there is a gradual elevation of platelet count day by day following enoxaparin administration. On an assessment using both World Health Organization-Uppsala Monitoring Centre (WHO-UMC) scale and Naranjo Causality Assessment Scale indicated that enoxaparin is the "probable" cause for the reaction. Conclusions We conclude that reactive thrombocytosis is a probable adverse drug reaction and close monitoring of blood counts is essential, following enoxaparin injection. More studies are to be conducted to identify further complications.