Management of Diarrhea in Elderly Patients

Assessment and Causes

• The American Society of Clinical Oncology notes that common causes of diarrhea in elderly patients include medications, infections, late effects of radiation therapy, malabsorption, and fecal impaction 4, 5, 6, 7

Rehydration Approach

• The American College of Physicians recommends oral rehydration therapy as the first-line treatment for mild diarrhea, using oral rehydration solutions containing 65-70 mEq/L sodium and 75-90 mmol/L glucose 1, 2, 8
• The American Geriatrics Society suggests total fluid intake should be 2200-4000 mL/day, adjusted based on the patient's condition, and caution against overhydration in elderly patients with heart or kidney failure 1, 2, 3

Pharmacological Management

• The American Gastroenterological Association recommends loperamide as the first-line antidiarrheal agent for elderly patients, with an initial dose of 4 mg and a maximum daily dose of 16 mg 1, 7

Nutritional Management

• The Academy of Nutrition and Dietetics recommends resuming an age-appropriate diet during or immediately after rehydration, and dietary modifications such as reduction of fatty foods, lactose-free diet, and avoidance of drinks with caffeine or alcohol 7, 8

Special Considerations for Elderly Patients

• The American Medical Directors Association notes that elderly patients dehydrate more rapidly and have higher mortality risk from diarrhea, and skin care is crucial to prevent irritation from fecal material 4, 7

When to Refer/Escalate Care

• The Society of Critical Care Medicine recommends referral or escalation of care for persistent gastrointestinal bleeding, evidence of free intra-peritoneal perforation, clinical deterioration, or development of oliguric acute kidney injury despite adequate volume resuscitation 1, 3, 5