Final answer:
The nurse should assess the athlete for signs of increased intracranial pressure (ICP) due to the administration of growth hormone.
Step-by-step explanation:
The nurse should assess the athlete for signs of increased intracranial pressure (ICP) due to the administration of growth hormone. Severe headache and flashes before the eyes are common symptoms of increased ICP. The nurse should monitor the athlete's vital signs, including blood pressure, heart rate, and respiratory rate, as well as assess for other signs of increased ICP such as vomiting, changes in level of consciousness, and altered vision.