The document discusses various causes, pathophysiology, and treatment of emesis and nausea. It covers the following topics: - Emetics that induce vomiting and their mechanisms of action. - Various classes of anti-emetics including antihistamines, neuroleptics, 5-HT3 antagonists, NK1 antagonists, cannabinoids, glucocorticoids, benzodiazepines and their mechanisms and uses. - Prokinetic drugs like metoclopramide and domperidone that enhance gastrointestinal motility. - Specific conditions like motion sickness, nausea during pregnancy, chemotherapy-induced nausea and vomiting, post-operative nausea and specific