Clinical meaning
The neurochemistry of alcohol withdrawal involves dual neurotransmitter derangement. Chronic ethanol potentiates GABA-A receptor chloride conductance while inhibiting NMDA receptor calcium influx. Compensatory neuroadaptation reduces GABA-A receptor expression (particularly alpha-1 subunit) and upregulates NMDA receptor density (NR2B subunit) and voltage-gated calcium channels. Abrupt cessation unmasks massive excitatory drive with glutamate-mediated excitotoxicity causing neuronal death and seizures. The kindling hypothesis explains progressive worsening: each withdrawal episode sensitizes neurons to subsequent withdrawal through long-term potentiation-like mechanisms. The clinician must prescribe evidence-based pharmacological protocols, manage complex medical comorbidities, order and interpret diagnostic studies, and coordinate long-term alcohol use disorder treatment including medication-assisted treatment (MAT).