Venlafaxine-associated serotonin syndrome causing severe rhabdomyolysis and acute renal failure in a patient with idiopathic Parkinson disease.
A 43-year-old male patient with idiopathic Parkinson disease, on dopaminergic therapy, was admitted with confusion and agitation, diaphoresis, and hyperkinesia after the commencement of the serotonin-noradrenaline reuptake inhibitor venlafaxine 2 weeks prior for depression. He was found to have severe rhabdomyolysis and developed acute renal failure. The most likely diagnosis was serotonin syndrome induced by venlafaxine, although neuroleptic malignant syndrome was also considered. The differential diagnosis, atypical features in this presentation, and possible mechanisms are discussed.
Rajapakse
Senaka
S
Department of Clinical Medicine, Faculty of Medicine, University of Colombo, Sri Lanka. senaka.ucfm@gmail.com
Abeynaike
Lakshan
L
Wickramarathne
Thanushi
T
D058186:Acute Kidney Injury / Q000175:diagnosis* / Q000209:etiology; D000328:Adult; D003511:Cyclohexanols / Q000009:adverse effects*; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy; D012206:Rhabdomyolysis / Q000175:diagnosis* / Q000209:etiology; D020230:Serotonin Syndrome / Q000139:chemically induced / Q000150:complications / Q000175:diagnosis*; D000069470:Venlafaxine Hydrochloride
D003511:Cyclohexanols; D000069470:Venlafaxine Hydrochloride