Management of Acute Gastroenteritis in Adults

Initial Assessment and Risk Stratification

The American Gastroenterological Association recommends that self-medication is safe for previously healthy adults under 75 years with sudden onset of loose/watery stools without warning signs 1, 2
Immediate medical evaluation is required for high fever, severe vomiting, or obvious clinical dehydration, as recommended by the American College of Gastroenterology 1, 2
Frail or elderly patients over 75 years and those with significant systemic illnesses require physician-directed treatment, according to the American Geriatrics Society 1, 2

The World Health Organization recommends maintaining adequate fluid intake guided by thirst using glucose-containing drinks or electrolyte-rich soups 1, 2
Oral rehydration solutions are not needed in otherwise healthy adults, as stated by the American Academy of Family Physicians 1, 2
Low-osmolarity ORS formulations are preferred over sports drinks if ORS is used, as recommended by the European Society for Pediatric Gastroenterology 3

The American College of Gastroenterology recommends using loperamide 2 mg with flexible dosing according to loose bowel movements once the patient is adequately hydrated 1, 2, 3
Evidence suggests anti-diarrheal medication may diminish diarrhea and shorten its duration, as stated by the National Institute of Diabetes and Digestive and Kidney Diseases 1, 2
Do not use loperamide in cases of bloody diarrhea or high fever, as recommended by the Infectious Diseases Society of America 3, 4

The American Gastroenterological Association recommends resuming normal eating without dietary restrictions, guided by appetite 1, 2
Avoid foods high in simple sugars, fatty, heavy, spicy foods, and caffeine, as stated by the Academy of Nutrition and Dietetics 1, 2, 3
Consider avoiding lactose-containing foods in more prolonged episodes, as recommended by the American College of Gastroenterology 1

Monitor for signs of worsening dehydration, such as decreased urine output, altered mental status, poor skin turgor, and dry mucous membranes, as recommended by the American Academy of Emergency Medicine 3
Reassess hydration status after 2-4 hours of oral rehydration, as stated by the Pediatric Emergency Medicine Committee 3

Practice proper hand hygiene after using toilet, before food preparation and eating, and after handling soiled items, as recommended by the Centers for Disease Control and Prevention 3
Use gloves and gowns when caring for people with diarrhea, as stated by the World Health Organization 3

Do not delay rehydration while awaiting diagnostic testing, as recommended by the American College of Emergency Physicians 3
Do not use inappropriate fluids like sports drinks as primary rehydration in moderate to severe dehydration, as stated by the American Academy of Pediatrics 3
Do not unnecessarily restrict diet during or after rehydration, as recommended by the American Gastroenterological Association 1, 2, 3