YohimbineDietary SupplementsAdrenergic alpha-AntagonistsAdrenergic alpha-2 Receptor AntagonistsReceptors, Adrenergic, alphaClonidinePrazosinReceptors, Adrenergic, alpha-2Adrenergic alpha-AgonistsNorepinephrineVitaminsIdazoxanAdrenergic AntagonistsDioxanesReceptors, AdrenergicOxymetazolineAdrenergic alpha-2 Receptor AgonistsXylazineFood, FortifiedPhentolamineMineralsAdrenergic alpha-1 Receptor AntagonistsChlorprothixeneImidazoline ReceptorsVas DeferensAnimal FeedAgmatineDose-Response Relationship, DrugSympatholyticsDietEpinephrineMydriasisPlant PreparationsRandom AllocationMicronutrientsFolic AcidDrug InteractionsElectric StimulationQuinoxalinesDihydroergotoxineDouble-Blind MethodSympathetic Nervous SystemDietary ProteinsRats, Inbred StrainsDihydroergotamineDexmedetomidineNutritional RequirementsPenile ErectionMedetomidineExtinction, PsychologicalMethysergideMolassesTrace ElementsVitamin ETetralonesPhenoxybenzaminePlant ExtractsTolazolinePhenylephrineAdrenergic AgonistsDrug-Seeking BehaviorAscorbic AcidNeuroeffector JunctionDigestionNutritional StatusPoaceaeRumenCattleMuscle ContractionAdrenergic NeuronsVitamin ANordefrinRats, Sprague-DawleyReceptors, Adrenergic, alpha-1Calcium, DietaryMethoxamineCatecholaminesAnimal Nutritional Physiological PhenomenaVitamin B ComplexGuinea PigsAzepinesPhytotherapyPropranololParasympathetic Nervous SystemGastrointestinal TransitBlood PressureGuanabenzalpha-MethyltyrosineDogsNutrition PolicyCross-Over Studies