Final answer:
The drug that could explain the symptoms experienced by the college student after attending a party is most likely a stimulant drug, such as amphetamines or cocaine.
Step-by-step explanation:
The drug that could explain the symptoms experienced by the college student after attending a party is most likely a stimulant drug, such as amphetamines or cocaine. These drugs can cause tachycardia (increased heart rate), hypertension (high blood pressure), excessive perspiration, and dilated pupils. They stimulate the sympathetic nervous system, leading to these physiological responses.