**Core Concept**
Delirium tremens (DTs) is a severe form of alcohol withdrawal characterized by sudden onset of confusion, altered level of consciousness, and hallucinations. It occurs typically 48-72 hours after the last drink in individuals with a history of chronic heavy alcohol use.

**Why the Correct Answer is Right**
Delirium tremens is a life-threatening condition that requires immediate medical attention. The pathophysiology involves a sudden decrease in GABA (inhibitory neurotransmitter) activity and an increase in glutamate (excitatory neurotransmitter) activity, leading to an imbalance in the neurotransmitter systems. This imbalance results in severe autonomic instability, including tachycardia, hypertension, and hyperthermia.

**Why Each Wrong Option is Incorrect**
**Option A:** Delirium tremens is typically associated with benzodiazepine withdrawal, not alcohol withdrawal. This option is incorrect because DTs is a specific syndrome characterized by alcohol withdrawal.

**Option B:** Delirium tremens does not primarily involve an increase in dopamine activity. While dopamine is involved in the reward and pleasure centers of the brain, the primary issue in DTs is the imbalance between GABA and glutamate.

**Option C:** Delirium tremens does not occur within 24 hours of the last drink. While some symptoms of alcohol withdrawal may appear within 24 hours, DTs typically occurs 48-72 hours after the last drink.

**Option D:** Delirium tremens is not primarily treated with antipsychotics. While antipsychotics may be used to manage hallucinations, the primary treatment for DTs involves benzodiazepines to manage the autonomic instability and prevent seizures.

**Clinical Pearl / High-Yield Fact**
The CIWA-Ar scale (Clinical Institute Withdrawal Assessment for Alcohol) is a widely used tool to assess the severity of alcohol withdrawal symptoms, including delirium tremens. This scale helps clinicians to identify patients at risk and initiate timely treatment.

**Correct Answer: C.** Delirium tremens typically occurs 48-72 hours after the last drink in individuals with a history of chronic heavy alcohol use.