AbstractThe sections in this article are:Gastrin and Cholecystokinin (CCK)Classification of Gastrin‐CCKReceptorsLocus of ReceptorsModulation of Gastrin‐CCKReceptorsPostreceptor MechanismsApplied Pharmacology in the GutSubstance P and TachykininsReceptors to TachykininsDegradation of TachykininsActions of TachykininsVasoactive Intestinal Polypeptide (VIP)ReceptorsAntagonistsControl of MotilityOpiatesNatural OpiatesReceptor TypesDegradation of OpiatesOpiates and Guinea Pig IleumActions on Segments of Gastrointestinal Tract in other SpeciesOpiates, Immune System, and Gastrointestinal MotilityRational Design of DrugsOther PeptidesMotilinSomatostatinNeurotensinGastrin‐Releasing Polypeptide/Bombesin FamilyGalanin
