A nurse is caring for a client who is exhibiting severe manifestations of serotonin syndrome. Which of the following is the priority nursing intervention?

The correct answer is D: Preparing for artificial ventilation. Severe serotonin syndrome can lead to respiratory failure due to hyperthermia, muscle rigidity, and altered mental status. Artificial ventilation is crucial to maintain adequate oxygenation and prevent respiratory arrest. Padding side rails (choice A) may prevent injury, but ensuring respiratory function takes precedence. Applying a cooling blanket (choice B) may help reduce hyperthermia but does not address the immediate threat of respiratory compromise. Administering an anticonvulsant (choice C) may be beneficial for seizures in serotonin syndrome but does not address the primary concern of respiratory distress.