Overview
Why Withdrawal Escalates
Chronic ethanol exposure changes the balance between inhibition and excitation in the central nervous system.
Chronic ethanol exposure changes the balance between inhibition and excitation in the central nervous system. Ethanol enhances GABA-mediated inhibition and suppresses NMDA-glutamate activity; over time, the brain compensates by reducing inhibitory responsiveness and increasing excitatory activity. When alcohol is abruptly reduced or stopped, that compensation remains. The result is an excitatory rebound: tremor, anxiety, insomnia, nausea, diaphoresis, tachycardia, hypertension, agitation, perceptual disturbances, seizures, and potentially delirium tremens. The nurse should notice the trajectory, not just the current appearance. A patient who is awake and oriented shortly after the last drink may still deteriorate as the alcohol effect clears. A history of withdrawal seizure or delirium tremens, repeated withdrawal episodes, heavy or sustained alcohol use, and major medical comorbidity raises concern for severe withdrawal. The risk assessment begins with the drinking history and previous withdrawal course, not with a single set of vital signs.