Plenty of people are allergic to foods. But you can also be sensitive to certain ingredients. For this reason, beer can make some people sick – even if they drink moderately.
Drinking higher amounts of alcoholic beer can cause many side effects including flushing, confusion, trouble controlling emotions, blackouts, loss of coordination, seizures, drowsiness, trouble breathing, hypothermia, low blood sugar, vomiting, diarrhea, bleeding, irregular heartbeat, and others.