Gastrointestinal TransitGastric EmptyingGastrointestinal MotilityIleusDefecationCroton OilCastor OilDigestive System Physiological PhenomenaZanthoxylumMedicine, East Asian TraditionalTechnetiumRadionuclide ImagingLoperamideConstipationImino AcidsTechnetium Tc 99m MedronateNalbuphineTechnetium Tc 99m Sulfur ColloidAntidiarrhealsColonGastrointestinal AgentsExplosionsMedetomidineReceptors, Serotonin, 5-HT4LantanaIntestine, SmallGastrointestinal TractSodium Pertechnetate Tc 99mPeristalsisGingerTechnetium Tc 99m DisofeninOrganotechnetium CompoundsPentazocineMorphineIndium RadioisotopesCisaprideRadiopharmaceuticalsMetoclopramideIntestinal AbsorptionAnalgesics, OpioidAdosterolYohimbineFecesClonidineIleumTechnetium Tc 99m Aggregated AlbuminStomachIodine RadioisotopesDietary FiberDose-Response Relationship, DrugDigestive SystemDelayed-Action PreparationsTechnetium Tc 99m LidofeninTechnetium Tc 99m Pentetate3-IodobenzylguanidineTomography, Emission-Computed, Single-PhotonThalliumDiarrheaTin CompoundsTechnetium CompoundsIntestinesProbioticsTechnetium Tc 99m PyrophosphateBiological AvailabilityThallium RadioisotopesTime FactorsAdrenergic alpha-AgonistsIodobenzenesPentetic AcidTechnetium Tc 99m SestamibiDrug InteractionsCross-Over StudiesRadioisotopesMuscle, SmoothAdministration, OralRadioisotope RenographyRats, WistarIndiumOxyquinolineTechnetium Tc 99m ExametazimeMuscle ContractionDouble-Blind Method