Ugh. I haven't drank in 10 years due to the intolerance, been sick 14 so I'll try to remember how it goes:
Alcohol tolerance prior to onset was not great but I still engaged in social drinking pretty much every weekend or therabouts. It never agreed with me enough to drink alone, or I probably would have.
Post onset:
--Less alcohol tolerance. Fewer drinks to be drunk.
--Headache starts not long after drinking vs the next day
--Next day worst headaches ever, achy muscles, severe dry mouth, bad nasal congestion, electric shock sensation in extremities, hot flashes, anxiety?, 2-3 day recovery time.
--Note: Even though alcohol made me much sicker, I do not remember vomiting more. I would have thought with those extreme post drinking 'hangover' symptoms more vomiting would have been in order. Perhaps the blood alcohol level does not get high enough due to the exaggerated symptoms which result in maybe not drinking as much quantity? I honestly do not know what triggers the vomiting in alcohol intoxication.