MorphineViscum albumChenopodium albumMorphine DependenceMorphine DerivativesRibosome Inactivating Proteins, Type 2Analgesics, OpioidSantalumDrug ToleranceNarcoticsVapor PressureNaloxoneToxins, BiologicalVolatilizationPlant PreparationsRibosome Inactivating ProteinsReceptors, Opioid, muNarcotic AntagonistsHomeopathyAnalgesiaInjections, SpinalPain MeasurementSubstance Withdrawal SyndromeCodeinePain, PostoperativeChenopodiumMethylococcus capsulatusPlant ExtractsPlant LectinsAnalgesicsViscumPainReceptors, OpioidMateria MedicaNaltrexoneChenopodiaceaeDictyosteliidaDose-Response Relationship, DrugAnalgesia, Patient-ControlledNalorphineMethylococcaceaePlants, MedicinalHeroinRats, Sprague-DawleyHydromorphoneSteamFentanylEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Periaqueductal GrayEricaceaeGasesOxycodonePentazocineMorphinansEnkephalinsNalbuphineBidensReceptors, Opioid, deltaPlant ProteinsMercuryMeperidineThebainePhytotherapyBehavior, AnimalPain ThresholdOxymorphoneAnalgesia, EpiduralOpiumLectinsEndorphinsHumidityMethadoneReceptors, Opioid, kappaInjections, SubcutaneousSpinal CordDrug InteractionsTime FactorsInjections, IntraventricularMercury PoisoningPapaverDouble-Blind MethodLevallorphanLocus CoeruleusHyperalgesiaPain, IntractableEtorphineTramadolBupivacaineArsenicalsInjections, IntravenousPruritusAntineoplastic Agents, PhytogenicClonidineBuprenorphineMiosis