Nausea and Vomiting
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- Nausea and vomiting may result from side effects of medications, systemic illnesses, central nervous system (CNS) disorders, and primary GI disorders.
- Vomiting that occurs during or immediately after a meal can result from acute pyloric stenosis (e.g., pyloric channel ulcer) or from functional disorders, while vomiting within 30–60 minutes after a meal may suggest gastric or duodenal pathology. Delayed vomiting after a meal with undigested food from a previous meal can suggest gastric outlet obstruction or gastroparesis.
- Symptoms of gastroparesis may be indistinguishable from chronic functional nausea and vomiting with normal gastric emptying (Clin Gastroenterol Hepatol 2011;9:567 [PMID:21397732]).