Why is alcohol detox so dangerous?
Alcohol is a depressant, and it depresses the activity level of the brain. The brain always strives for equilibrium, and to compensate for the continual presence of alcohol it increases its sensitivity to excitatory endogenous neurotransmitters. If you abruptly stop drinking, the brain remains sensitive to excitatory neurotransmitters, and without alcohol slowing it down the brain races forward; causing a great many unpleasant and dangerous side effects.