NCT03579446 2025-08-03Levorphanol as a Second Line Opioid in Reducing Pain in Patients With CancerM.D. Anderson Cancer CenterPhase EARLY_PHASE1 Terminated43 enrolled
NCT00726830 2020-09-24Methadone, Morphine, or Oxycodone in Treating Pain in Patients With CancerM.D. Anderson Cancer CenterPhase NA Terminated1 enrolled 3 charts