Gastrointestinal TransitGastric EmptyingGastrointestinal MotilityIleusDefecationCroton OilCastor OilDigestive System Physiological PhenomenaZanthoxylumMedicine, East Asian TraditionalConstipationLoperamideNalbuphineAntidiarrhealsGastrointestinal AgentsExplosionsMedetomidineColonReceptors, Serotonin, 5-HT4LantanaGastrointestinal TractIntestine, SmallGingerPentazocinePeristalsisMorphineCisaprideMetoclopramideIntestinal AbsorptionAnalgesics, OpioidFecesYohimbineClonidineIleumBipolar DisorderDose-Response Relationship, DrugDietary FiberDelayed-Action PreparationsDigestive SystemMental DisordersDiarrheaStomachAnxiety DisordersMood DisordersIntestinesProbioticsBiological AvailabilityAdrenergic alpha-AgonistsDrug InteractionsCross-Over StudiesDiagnostic and Statistical Manual of Mental DisordersMuscle, SmoothAdministration, OralTime FactorsDouble-Blind MethodRats, WistarMuscle ContractionDepressive Disorder, Major