Management of Fever Induced by Amisulpride

Diagnosis and Management

• The primary management of amisulpride-induced fever involves discontinuation of the medication and providing supportive care until symptoms resolve, which typically takes 1-3 days but may extend up to 7 days after removing the offending agent 1, 2
• Drug-induced fever from amisulpride is primarily diagnosed by establishing a temporal relationship between starting the medication and the onset of fever 1
• There are no characteristic patterns to drug-induced fevers - they may occur days after administration begins and can take several days to resolve after discontinuation 2
• The lag time between initiating a drug and fever development averages 21 days (median 8 days) 2
• Rash and eosinophilia are uncommon accompaniments to drug-induced fever 1
• Simple drug-induced fever (hypersensitivity reaction) should be considered when evaluating fever in a patient taking amisulpride 1
• Neuroleptic malignant syndrome (NMS) - a rare but serious complication of antipsychotic medications, should also be considered 3
• Infection (rule out with appropriate cultures and clinical evaluation) is another potential cause of fever in patients taking amisulpride 1
• NMS has been strongly associated with antipsychotic medications including amisulpride 3
• Key features of NMS include muscle rigidity 4, hyperthermia 4, elevated creatinine phosphokinase concentrations 1, and central initiation of muscle contraction 3
• For simple drug-induced fever, discontinue amisulpride and provide supportive care with antipyretics and hydration 1, 2
• For suspected NMS, immediately discontinue amisulpride, provide intensive supportive care, consider benzodiazepines for agitation and muscle activity, manage hyperthermia with external cooling measures, and treat dehydration or elevated creatine kinase with IV fluids 4, 5
• Patients with a history of NMS should not be rechallenged with the same antipsychotic 1
• Monitor for at least 24-48 hours after discontinuation to ensure resolution of symptoms 2
• Don't assume fever is always infectious in origin when a patient is on amisulpride, and don't continue amisulpride if drug fever is suspected - discontinuation is the definitive treatment 1
• Don't rechallenge patients who experienced anaphylaxis or toxic epidermal necrolysis 1
• Don't overlook the possibility of NMS, which requires immediate intervention 3
• Don't delay treatment of suspected NMS as it can be life-threatening 4