Final answer:
For a football player who has passed out from practice on a hot day, the best treatment would include rehydration with fluids containing electrolytes, rather than antipyretics or other medications.
Step-by-step explanation:
The football player who passed out during practice on a hot day and is now experiencing excessive sweating with normal blood pressure may be suffering from heat exhaustion or heat stroke, conditions often related to dehydration and electrolyte imbalance. Considering the symptoms, the most appropriate treatment would involve rehydration with fluids containing electrolytes. While medication such as antipyretics may be beneficial for reducing fever, they are not the primary treatment for this condition. Instead, immediate rehydration, possibly with an oral rehydration solution like Gatorade or intravenous fluids if necessary, would be the initial course of action to correct the fluid and electrolyte deficits and support recovery.