Final answer:
The nurse suspects the patient is experiencing serotonin syndrome due to the presence of symptoms such as large pupils, hallucinations, restlessness, and confusion. Serotonin syndrome is a potentially life-threatening condition caused by an excess of serotonin in the brain.
Step-by-step explanation:
The nurse suspects that the patient is experiencing serotonin syndrome. Serotonin syndrome is a potentially life-threatening condition caused by an excess of serotonin in the brain. It can occur when certain medications, such as selective serotonin reuptake inhibitors (SSRIs) or serotonin-norepinephrine reuptake inhibitors (SNRIs), are taken in combination with other medications that increase serotonin levels. Symptoms of serotonin syndrome include large pupils, hallucinations, restlessness, confusion, and an altered mental state.