Does alcohol makes a person a beast?

Question by Yellowstone: Does alcohol makes a person a beast?
It hurts a lot to think and write my following note. My friend’s brother is a alcohol addict, After consumption he turns into a virtual demon, fighting, abusing, screaming at all living beings even on his own mother and other members.. But when he’s sober he is quite like a kitten. His behaviour and attitude is extremely negative and it enhances after drinking sessions.
If a psychologist, reads this question here, can you please advice us how to handle this situation?

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