Sorry for replying in nglish, but I have a similar issue.

Apparentlly what can happen is you can take a small amount of alchol, which causes a reaction, say in the morning. Once the mild reaction is over, you can drink more heavily with no further reaction occuring. This was the issue with a relative of mine, who would have a beer in the morning, and be drunk by the evening with no redness.

I am not aware of any others, does anyone know if things like anti-inflamitories, muscular relaxants, blood thinners or anything like that have been used? The problem was that my relative worked in a hospital!!!!