Controlled release morphine.
D000284:Administration, Oral; D003692:Delayed-Action Preparations; D006801:Humans; D004091:Hydromorphone / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage / Q000627:therapeutic use*; D010148:Intractable Pain / Q000188:drug therapy*
D003692:Delayed-Action Preparations; D009020:Morphine; D004091:Hydromorphone