Switching to methadone.
Enck
R E
RE
D000701:Analgesics, Opioid / Q000494:pharmacology / Q000627:therapeutic use*; D004334:Drug Administration Schedule; D017051:Hospice Care / Q000379:methods*; D006801:Humans; D008691:Methadone / Q000494:pharmacology / Q000627:therapeutic use*; D018579:Patient Selection; D017410:Practice Guidelines as Topic; D013810:Therapeutic Equivalency
D000701:Analgesics, Opioid; D008691:Methadone