Which is a severe symptom of alcohol withdrawal that can lead to death?

Delirium tremens is a severe symptom of alcohol withdrawal characterized by confusion, significant agitation, hallucinations, and autonomic instability, including changes in heart rate and blood pressure. It typically occurs 48 to 96 hours after the last drink and can be life-threatening if not treated promptly. The risk of complications such as seizures, aspiration pneumonitis, and cardiovascular collapse makes it a critical condition requiring immediate medical attention.

The other symptoms listed, while they may be uncomfortable and distressing, do not carry the same life-threatening potential. Insomnia, headache, and irritability are common withdrawal symptoms but are much less severe and generally do not pose an immediate risk to life in the way that delirium tremens can. Thus, recognizing delirium tremens as a serious consequence of alcohol withdrawal is essential in clinical practice to ensure timely and effective intervention.