Hi,
Alcohol is a central nervous system depressant and not a stimulant. It is quickly absorbed through stomach and carried through blood to brain and acts on neurons. Brain has a threshold for the amount of alcohol it can tolerate. Few people have lower threshold if they have underlying seizure tendency. Mixing alcohol with other recreational drinks pose one at high risk for seizure. Drinking above this threshold leads to seizure. Though recurrent epileptic events can bring out structural brain lesions, often those who abstain from alcohol after a single seizure, will not get recurrent seizures.