Alcohol is a depressant; it slows the function of the central nervous system and alters a person’s perception, emotion, movement; vision and hearing.
Small amounts can make a person feel more relaxed or less anxious. Bigger amounts lead to intoxication by causing greater changes in the brain. Overconsumption has for effect: loss of coordination, staggering, slurred speech, feeling of confusion and disorientation and a dramatically slowed reaction time. It can make someone very friendly and talkative or aggressive and angry.
When large amounts (binge drinking) are consumed in very little time the result is alcohol poisoning which can result in violent vomiting, extreme sleepiness, unconsciousness, difficulty in breathing, dangerously low blood sugar, seizures and even death.