A nurse in the emergency department is caring for a client who has serotonin syndrome. The nurse should assess the client for which of the following manifestations?

Choice A reason: Priapism is not a typical symptom of serotonin syndrome. It may occur with certain medications but is unrelated to serotonin toxicity. Choice B reason: Bradycardia is not characteristic of serotonin syndrome. Tachycardia is more common due to autonomic hyperactivity. Choice C reason: Hyperpyrexia (extremely high fever) is a hallmark of severe serotonin syndrome. It reflects autonomic instability and requires immediate intervention. Choice D reason: Paresthesia may occur but is not a defining feature. Neuromuscular symptoms like clonus and hyperreflexia are more indicative.