<prompt> Drug used in acute exacerbation of ulcerative colitis isSulfasalazineSteroidsInfliximabCyclosporine  <response>: Cyclosporine is used for acute exacerbation of ulcerative colitis, and also as rescue therapy to prevent surgery in ulcerative colitis responding poorly to glucocoicoids. Reference : Davidson, 23rd Edition, page no : 821. 