A 40-year-old man is brought to emergency. On examination he appears conscious and oriented but repos hearing voices of people threatening him. He admits to a history of chronic alcohol use. What is the most appropriate diagnosis?
**Core Concept**
Delirium tremens (DTs) is a severe complication of alcohol withdrawal characterized by sudden onset of altered mental status, hallucinations, and autonomic instability. It occurs in individuals with a history of prolonged and excessive alcohol consumption.
**Why the Correct Answer is Right**
The diagnosis of delirium tremens is often made in the context of a patient's history of chronic alcohol use and the acute onset of symptoms such as auditory hallucinations, disorientation, and altered mental status. The pathophysiology of DTs is believed to involve disturbances in the neurotransmitter systems, particularly the GABA and glutamate systems, leading to an imbalance in excitatory and inhibitory neurotransmission.
**Why Each Wrong Option is Incorrect**
**Option A:** Wernicke's encephalopathy is a different condition that also occurs in the context of chronic alcohol use, but it is characterized by a triad of confusion, ataxia, and ophthalmoplegia, rather than auditory hallucinations.
**Option B:** Schizophrenia is a chronic mental health disorder that can present with hallucinations, but it typically has a more gradual onset and is not directly related to alcohol withdrawal.
**Option C:** Bipolar disorder can also present with hallucinations, but it is typically characterized by episodes of mania or depression, rather than the acute onset of symptoms seen in delirium tremens.
**Option D:** Anxiety disorders can present with auditory hallucinations, but they are typically not as severe or acute as those seen in delirium tremens.
**Clinical Pearl / High-Yield Fact**
Delirium tremens is a medical emergency that requires prompt recognition and treatment to prevent complications such as seizures and death. A key clinical clue to the diagnosis is the presence of a history of chronic alcohol use and the acute onset of symptoms such as auditory hallucinations and altered mental status.
**Correct Answer:** C.