Why is it that someone become ill after very little alcohol?

Question

A close loved one becomes violently ill the morning after drinking just one beer. I mean an extremely low amount (one beer or one shot)can send this person puking all day the next day.

Is something wrong?

Answer 1

Alcohol is a poison. It sounds like this person is especially sensitive.

Answer 2

My g/f is in the bathroom puking her guts out after drinking about 2 shots. This has happened both times she has drank. I have come to the conclusion that these people don't have the enzyme to break down the alcohol in the body which is the reason the body has to puke all the substance out.