yea , in some antibiotics ,
for ex. if use take flagyl then drink any amount of alcohol , u'll have nausea and vomiting
but always read the inst. that come with the AB
LOL you can't take alcohol no matter what, either with antibiotics or without them :P
No really, I just found this article which may give you some hint
Antibiotics and Alcohol
The antibiotics kills everything in your body of living organisms (that's why you should eat yoghurt while taking a course of antibiotics.
The reason alcohol shouldn't be mixed with anitbiotics is that there might be complications and certain organ damage (i.e. Kidney & liver problems) but mainly alcohol diminishes the effect of the antibiotics making ineffectual.