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Alcohol withdrawal seizures
Epilepsy and Behavior, 06/19/09

Hughes JR - During alcohol intoxication chronic adaptations of NMDA and GABA receptors occur, and during alcohol withdrawal a hyperexcitable state develops. In studies on humans, during intoxication the NMDA receptors are activated and mediate tonic inhibition. In withdrawal, a rebound activation of these receptors occurs. Both GABA-A and GABA-B receptors, especially the ?2 subunit of GABA-A receptors, are also likely involved. Homocysteine increases with active drinking, and in withdrawal, excitotoxicity likely is induced by a further increase in homocysteine, viewed as a risk factor for AWS and also as a screening tool. The dopamine transporter gene is also associated with AWS. Characteristics involves changes in the ECG, especially an increase in QT interval, and EEG changes, including abnormal quantified EEG, at times periodic lateralized epileptiform discharges, and especially seizures, usually occurring 6–48 h after the cessation of drinking. Therapy has emphasized benzodiazepines, mainly diazepam and lorazepam, but more standard antiepileptic drugs, like carbamazepine and topiramate, are also effective and safe.

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