Rhabdomyolysis and Neuroleptic Malignant Syndrome in a Postrenal Transplant Patient: Is Desidustat a Culprit?

Abstract

We report a case of a 46-year-old female – a postrenal transplant patient, having developed rhabdomyolysis and neuroleptic malignant syndrome (NMS), after 2.5 months of desidustat initiation – for anemia. Post renal transplant anemia (PTA) is common among renal transplant recipients. Apart from treating it with iron supplements, folic acid, andrecombinant human erythropoietin (EPO), novel agents like hypoxia-inducible factor–prolyl hydroxylase domain (HIF–PHI) are also used, with a very few studies available on its efficacy and safety in PTA patients. Anemia occurring in the first 6 months is called early PTA – occurring most commonly due to iron deficiency, while anemia occurring after 6 months is called late PTA – associated with impaired graft function. The optimal target of hemoglobin in transplant recipients is 12.5–13 gm/dl, which is higher than targets in chronic kidney disease patients. NMS is a life-threatening emergency – mainly seen in patients on antipsychotic medications. It needs to be differentiated from other closely related conditions such as central nervous system infections (meningitis and encephalitis), tetanus, heatstroke, serotonin syndrome, and thyrotoxicosis. Desidustat is an oral HIF–PHI that stimulates erythropoiesis by preventing EPO degradation. Its adverse effects include high blood pressure, myocardial infarction, heart failure, high potassium, and dizziness; however, there is only one case report of rhabdomyolysis associated with desidustat, and none of NMS. It is, therefore, important to be aware of this potential severe side effect of the drug that was not known earlier so that practicing physicians can be vigilant of the same.