Muaaaaah-haaaahaaahaaa!!!!Allergy??Think Ali's tendency to drink 20 pints a night will easily explain his throwing up,heehee.Try 2-3 pints,see what happens.If you throw up after that as well,then you do seriously might have an allergy and swap to drugs,heeheehee ;-> . Some people are allergic to yeast in alcohol,but I doubt thats the case,if you are ok eating bread etc.
Anyhows,get well soon! ;->