EVIDENCE LIBRARY
Catatonia-Like Sedation Case Reported an Unrevealing Lorazepam Challenge Before Drug Revision
A psychiatric case described severe immobility during risperidone and valproate treatment. The authors considered medication-induced sedation after the presentation did not clarify with a lorazepam challenge.
A psychiatric case described severe immobility during risperidone and valproate treatment. The authors considered medication-induced sedation after the presentation did not clarify with a lorazepam challenge.
The reported findings
A young woman developed increasing somnolence, immobility, food refusal, and tremor while receiving risperidone and valproate. Her measured valproate concentration was above the reported therapeutic range.
The lorazepam challenge was unrevealing. Risperidone was discontinued and replaced with olanzapine, followed by rapid recovery within twenty-four hours.
A challenge is one piece of evidence
Nonresponse to lorazepam does not independently prove a drug interaction or exclude every form of catatonia. Likewise, improvement after a medication change is suggestive without controlling for the full clinical course.
The single case cannot establish the frequency or mechanism of the suspected interaction. It supports considering sedative adverse effects when immobility resembles catatonia. An accurate account retains measured concentrations, doses, challenge response, examination findings, and the sequence of drug changes rather than assuming every motionless patient requires escalating benzodiazepines.
Source paper
Original analysis of the supplied journal article, identified as PMC13240619.