Jón Magnús Jóhannesson¹

Hrönn Harðardóttir²

Bjarni Guðmundsson³

Gunnar Guðmundsson^2,4

¹Landspitali University Hospital, Division of Internal Medicine, ²Landspitali University Hospital, Department of Respiratory Medicine and Sleep, ³Landspitali University Hospital, Neurology Ward, ⁴University of Iceland, Faculty of Medicine.

Correspondence: Jón Magnús Jóhannesson, jmj1992@hotmail.com

Key words: Fever, Delirium, Neuroleptic malignant syndrome, Drug-related adverse event.

Fever complicated by delirium is a common problem in emergency departments and inpatient wards. There are various possible causes that must all be contemplated. Infections are prominent causes due to acuteness and severity, but when generating a differential diagnosis, other causes may be life-threatening and require swift diagnosis and management. We present here a case of a 58 year old man presenting at the emergency department with fever and delirium. After comprehensive history-taking and examination, alongside targeted testing, the correct diagnosis was ascertained, leading to appropriate treatment.