AnalgesicsPain MeasurementMorphinePainAnalgesics, OpioidDrug ToleranceInjections, SpinalNaloxoneNarcotic AntagonistsAcetic AcidReceptors, Opioid, muPain ThresholdHyperalgesiaFormaldehydeAnalgesics, Non-NarcoticNociceptionReceptors, OpioidCarrageenanNaltrexoneDipyroneNociceptorsDose-Response Relationship, DrugAnalgesiaReceptors, Opioid, deltaNociceptive PainSpinal CordPeriaqueductal GrayEdemaRats, Sprague-DawleyInjections, IntraventricularHot TemperatureMorphinansOpioid PeptidesCaulerpaMice, Inbred ICRDynorphinsPlant ExtractsReceptors, Opioid, kappaNarcoticsBehavior, AnimalEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Enkephalin, D-Penicillamine (2,5)-EnkephalinsCombretumReaction TimeTramadolNalorphineRats, WistarAcute PainRotarod Performance TestClonidineDrug SynergismCyclohexanecarboxylic AcidsDrug InteractionsPhytotherapyFentanylEnkephalin, MethionineTailLecythidaceaeMorphine DependenceAnti-Inflammatory AgentsDiocleaMorphine DerivativesRutaceaeAdrenergic alpha-AgonistsBuprenorphineNeuralgiaMonoterpenesMotor ActivityDisease Models, AnimalCapsaicinNalbuphinePiperidinesAnti-Inflammatory Agents, Non-SteroidalAdrenergic alpha-2 Receptor AgonistsInjections, SubcutaneousCannabinoidsInjections, IntraperitonealOxycodoneDiclofenacFreund's AdjuvantPain PerceptionReceptor, Cannabinoid, CB2AmaranthusCyclohexanolsPhysical StimulationPentazocineClomipramineN-substituted GlycinesReceptors, Adrenergic, alpha-2BenzomorphansEnkephalin, LeucineReceptor, Cannabinoid, CB1AminesOligopeptidesYohimbineEndorphinsMyrtaceaePosterior Horn CellsAcetaminophen