I recently turned 21 and of course, had to celebrate accordingly. However, when I heard about it not being the best to mix alcohol and met, I stopped taking met on wednesday evening (usually one every AM and PM) in order to go out fri nite. I had a fairly large amount of alcohol and I was fine (except for the effects of the alcohol - which, might I add, were very fun, since I didn't get sick or hungover!!!).
HOWEVER, I resumed my met on Sun evening and monday evening, I had ONE mixed drink (very small amount of alcohol, in comparison with the previous few days) and I was feeling it. I didn't get sick, but I had horribly violent stomach cramps (I guess???) and diarrhea for a few days. So, my new rule is stop met at least 48 hours in advance and don't mix at all!!!
Hope I was able to help and have fun at the wedding & reception (but not TOO much fun!!!)
