Clinical meaning
Alcohol is a central nervous system (CNS) depressant that enhances inhibitory GABA activity and suppresses excitatory glutamate (NMDA) signaling. Chronic alcohol use causes neuroadaptive upregulation of NMDA receptors and downregulation of GABA receptors. When alcohol is abruptly discontinued, unopposed excitatory neurotransmission produces autonomic hyperactivity—tachycardia, hypertension, diaphoresis, tremors—progressing to seizures and potentially fatal delirium tremens. Symptoms begin 6-24 hours after the last drink. The nurse monitors vital signs, observes for escalating symptoms, administers medications as ordered, and reports changes immediately.
Exam relevance
Risk factors: - Chronic heavy alcohol use - Previous history of alcohol withdrawal seizures or delirium tremens - Concurrent medical illness or infection - Older age - Co-occurring substance use - Nutritional deficiencies (thiamine, folate, magnesium) - Hepatic dysfunction - Prior episodes of withdrawal (kindling effect increases severity)
Diagnostics: - Monitor vital signs frequently as ordered: heart rate, blood pressure, temperature - Report tachycardia (HR >100), hypertension, or fever to the RN - Observe and document tremor severity, diaphoresis, and agitation - Report any hallucinations (visual, auditory, or tactile) to the nurse immediately - Monitor hydration status: intake and output as directed - Report seizure activity immediately with onset time and duration