<prompt> Drug used for trabeculectomyMitomycin-CAzathioprineCituximabKetorolac  <response>: The main reason of failure of trabeculectomy surgery is scarring and closure of drainage site Antimetabolites prevent scarring and can be used to increase the success rate of trabeculectomy The most commony used antimetabolites are mitomycin-C and 5-fluorouracil. 