Administration, SublingualTabletsBuprenorphineTablets, Enteric-CoatedAnalgesics, OpioidExcipientsChemistry, PharmaceuticalDrug CompoundingDelayed-Action PreparationsAnesthetics, IntravenousAnalgesia, EpiduralTechnology, PharmaceuticalMethylcelluloseDouble-Blind MethodAdministration, OralPowdersSufentanilAdjuvants, AnesthesiaPain, PostoperativeAnesthesia, IntravenousAdministration, CutaneousAlfentanilBupivacaine