We witnessed many patients taking Flagyl - Metronidazel and they drank alcohol having very unpleasant and some even life-threatening side effects, Therefore if you're taking Flagyl - Metronidazel, do NOT drink! (We pointed out one Antibiotic, but there are much more other medications with the same danger).
In any case, each and every Crohn's and Colitis patient should double check with their doctor if drinking alcohol while taking your medication is safe, and if you're allowed to drink even a drop!
Please be responsible! Do it for yourself and for your family.
A Freilichen Purim! And Tumid B'Simcha!