... nausea and vomiting. Approach to the Patient: Nausea and Vomiting History and Physical Examination The history helps define the etiology of unexplained nausea and vomiting. Drugs, toxins, and ... vomiting with or without nausea. Chapter 039. Nausea, Vomiting, and Indigestion (Part 3) Disordered gut sensorimotor function also commonly causes nausea and vomiting. Gastroparesis is defined ... intestinal and colonic motor activity and leads to retention of food residue and secretions, bacterial overgrowth, nutrient malabsorption, and symptoms of nausea, vomiting, bloating, pain, and altered...