What is the most appropriate next step for a 21-year-old man found semi-conscious after drinking at a party?

In a scenario where a young adult is found semi-conscious following alcohol consumption, checking blood glucose is the most appropriate immediate step. Hypoglycemia, or low blood sugar, can present with altered levels of consciousness, and it is crucial to rule this out as a potential cause of the individual's condition.

Alcohol, particularly when consumed in excess, can lead to hypoglycemia, especially if the person has not eaten adequately. A rapid assessment of blood glucose levels can help determine if this is the case, allowing for prompt treatment if necessary. If hypoglycemia is present, administration of glucose can quickly reverse the semi-conscious state.

While checking body temperature or initiating intravenous fluids may be useful in a broader clinical assessment or management plan, the immediate priority in this situation is to ensure that the patient's blood glucose levels are within a safe range. Similarly, a CT scan of the head may be warranted later to evaluate for head injuries or complications, but it is not the immediate concern when addressing altered consciousness stemming from possible hypoglycemia related to alcohol consumption.