SuspensionsAdministration, OralHindlimb SuspensionDrug Administration ScheduleInjections, IntravenousTime FactorsDose-Response Relationship, DrugUnited States Food and Drug AdministrationRats, Sprague-DawleyDrug Administration RoutesRats, WistarAdministration, IntranasalDisease Models, AnimalInjections, IntraperitonealLiverBiological AvailabilityInjections, SubcutaneousMice, Inbred C57BLAdministration, RectalCells, CulturedAdministration, TopicalHalf-LifeInjections, IntramuscularRats, Inbred StrainsInfusions, IntravenousArea Under CurveMice, Inbred BALB CDrug InteractionsAdministration, IntravenousRabbitsDogsTissue DistributionInjections, IntraventricularAdministration, CutaneousKineticsCross-Over StudiesDouble-Blind MethodTreatment OutcomeKidneyChromatography, High Pressure LiquidBehavior, AnimalRandom AllocationBrainPlant ExtractsBody WeightRecombinant ProteinsInjectionsAdministration, InhalationBlood PressureSpleenRNA, MessengerInfusions, ParenteralAdministration, SublingualAnalysis of VarianceMice, Inbred ICRMice, Inbred StrainsOrgan SizeLungParticle SizeRats, Inbred F344EthanolDrug ToleranceMetabolic Clearance RateMorphineCulture MediaAntibodies, MonoclonalDrug CombinationsHydrogen-Ion ConcentrationErythrocytesMotor ActivityMicrospheresChemistry, PharmaceuticalPregnancyAntineoplastic AgentsDrug Evaluation, PreclinicalInjections, SpinalEnzyme InhibitorsCell SeparationCell DivisionMice, KnockoutEstradiolNeoplasms, ExperimentalHeart RateAbsorptionAnti-Bacterial AgentsImmunohistochemistryCell LineColloidsAnalgesics, OpioidIntestinal AbsorptionSelf AdministrationCell SurvivalCell Culture TechniquesProdrugsMicroscopy, ElectronDrug Therapy, CombinationDrug CarriersDrug SynergismNeoplasm TransplantationDelayed-Action Preparations