MRCP2-0542

A 15-year-old girl was admitted to the hospital with symptoms of nausea and vomiting, which were suspected to be caused by a viral gastroenteritis. The on-call team treated her with IV fluids and intravenous anti-emetics. However, the nursing staff on the ward reported that she is now experiencing seizures.

Upon arrival, the patient appears distressed and has a blood pressure of 148/88 mmHg. She has a GCS of 15 but is staring upwards with a stiff neck and jaw muscle spasms. Her limb tone, power, and reflexes are normal, and she has flexor plantar responses.

What is the most appropriate treatment for this patient?