Psychosis is generally defined as a serious mental condition wherein a person loses touch with reality. This occurs together with changes in behaviour and personality.
Alcohol is a neurotoxin that has a complex effect on the brain. It can induce psychosis in people who are very drunk or who are withdrawing from chronic alcohol abuse. Chronic alcohol abuse can also result in neurological damage. Repeatedly going through a cycle of heavy drinking and withdrawing from alcohol can be quite dangerous.