Overview The CHECK Trial: A Comparison of Headache Treatment in the ED: Compazine Versus Ketamine Status: Completed Trial end date: 2017-03-21 Target enrollment: Participant gender: Summary This study compares the efficacy of low dose Ketamine versus Compazine for the control of headache in patients presenting to the Emergency Department. Phase: Phase 4 Details Lead Sponsor: University Medical Center of Southern NevadaTreatments: DiphenhydramineKetamineOndansetronProchlorperazinePromethazine