NCT00001698 2008-03-04Randomized, Double Blind, Placebo-Controlled, Phase IIB Trial of Ketorolac Mouth Rinse Evaluating the Effect of Cyclooxygenase Inhibition on Oropharyngeal Leukoplakia: Collaborative Study of the NCI, NIDCD and the NIDCRNational Institutes of Health Clinical Center (CC)Phase 2 Completed57 enrolled