CapsaicinPlacebo EffectSensory System AgentsDouble-Blind MethodTRPV Cation ChannelsNeurons, AfferentNociceptorsSubstance PReceptors, DrugCalcitonin Gene-Related PeptideCoughCross-Over StudiesIrritantsDose-Response Relationship, DrugPainAntipruriticsCapsicumTreatment OutcomeAdministration, TopicalDiterpenesNerve Fibers, UnmyelinatedPain MeasurementNeurokinin AInjections, IntradermalReflexGanglia, SpinalHyperalgesiaNerve FibersRats, Sprague-DawleyAntitussive AgentsRuthenium RedMustard PlantTachykininsAnalgesicsAdministration, OralAfferent PathwaysVagus NervePolyunsaturated AlkamidesNeurogenic InflammationMentholReceptors, Neurokinin-2Physical StimulationTime FactorsTachyphylaxisAdministration, InhalationSensory Receptor CellsBradykininNeurokinin-1 Receptor AntagonistsTonguePain ThresholdPiperidinesDrug Therapy, CombinationHot TemperatureMucunaTrigeminal GanglionPruritus AniRandomized Controlled Trials as TopicReceptors, TachykininDenervationDrug Administration ScheduleBlood PressureGuinea PigsReceptors, Neurokinin-1Electric StimulationVagotomyClinical Trials as TopicRats, WistarEndocannabinoidsIsoindolesTrigeminal Caudal NucleusAnalgesics, Non-NarcoticDrug InteractionsSingle-Blind MethodNodose GanglionQuinuclidinesHistamineAnti-Inflammatory Agents, Non-SteroidalSkinTransdermal PatchPruritusTrigeminal NerveRhizotomy