EVIDENCE LIBRARY
Food aversion after perampanel addition to clonazepam and phenytoin
A case report used the medication-change timeline to distinguish a new adverse event from established background treatment.
A case report used the medication-change timeline to distinguish a new adverse event from established background treatment.
The temporal pattern
A woman with refractory epilepsy was receiving clonazepam and phenytoin when perampanel was added and increased. After a later dose increase, she developed marked food aversion, irritability, and anxiety without improved seizure frequency. Symptoms improved with dose reduction and resolved after discontinuation.
The authors considered perampanel involvement likely, while the exact mechanism remained unknown.
Background exposure is not automatic causation
The presence of clonazepam in the regimen does not establish it as the cause of the new symptom. Conversely, a temporal association with the added drug does not exclude every contribution from interactions or the underlying illness. A single case cannot estimate risk.
For review, identify which exposures were stable and which changed before the event. The report illustrates an adverse-event chronology in polytherapy rather than proving a specific benzodiazepine interaction or a general appetite effect.
Source paper
Original analysis of the supplied journal article, identified as PMC6398359.