Management of Diarrhea in Elderly Patients

Initial Assessment and Treatment

The American College of Physicians recommends ensuring adequate hydration with oral rehydration solutions (ORS) as the most critical initial intervention for elderly patients with diarrhea, as they face a significantly higher risk of severe complications and death from dehydration compared to younger adults 1, 2
The European Society of Clinical Microbiology and Infectious Diseases suggests grading the severity of diarrhea, with Grade 1-2 being mild to moderate increase in stool frequency without systemic symptoms, and Grade 2 with complications or Grade 3-4 indicating presence of fever, severe cramping, vomiting, diminished performance status, signs of dehydration, or bloody stools 1, 3
The American Geriatrics Society recommends identifying red flags requiring urgent referral, including tachycardia suggesting sepsis 1, and clinical signs of peritonitis (rebound tenderness, absent bowel sounds) 4

The National Comprehensive Cancer Network recommends a medication review to check for recent antibiotics (C. difficile risk), laxative abuse, cholinesterase inhibitors like donepezil (dose-dependent GI effects), or other causative medications 5
The American College of Gastroenterology suggests a digital rectal examination to assess for fecal impaction, which can paradoxically present as overflow diarrhea in elderly patients 3, 4
The European Society of Gastroenterology recommends an abdominal examination to evaluate for distension, masses, tenderness, and bowel sounds to identify obstruction or perforation 4

The American College of Physicians recommends prescribing oral rehydration solutions (ORS) containing 65-70 mEq/L sodium and 75-90 mmol/L glucose, with a total fluid intake of 2200-4000 mL/day 1
The National Comprehensive Cancer Network suggests a bland/BRAT diet (bread, rice, applesauce, toast) 6
The American Geriatrics Society recommends considering anticholinergics (hyoscyamine or atropine) for persistent symptoms, and octreotide for refractory cases 6

The American College of Clinical Pharmacy recommends considering dose reduction of donepezil from 10 mg to 5 mg daily if diarrhea persists, and administering it in the morning rather than evening to minimize sleep disturbances 5
The European Society of Clinical Microbiology and Infectious Diseases suggests that elderly patients are more susceptible to dehydration leading to acute kidney injury, electrolyte imbalances, malnutrition, and pressure ulcer formation, as well as QT prolongation and cardiac arrhythmias from dehydration or loperamide 3, 5

The American College of Physicians and the Infectious Diseases Society of America recommend that elderly patients with signs of severe dehydration, shock, or altered mental status should receive IV fluids 7
The Infectious Diseases Society of America suggests that stool characteristics, such as frequency, volume, presence of blood, mucus, or pus, should be assessed in elderly patients with diarrhea 8
The Centers for Disease Control and Prevention recommend that hand hygiene with soap and water should be performed after using the toilet, before eating, and after handling garbage or soiled laundry 7
The World Health Organization recommends that oral rehydration solutions (ORS) containing 65-70 mEq/L sodium and 75-90 mmol/L glucose should be used for rehydration in elderly patients with diarrhea 7

The American Geriatrics Society recommends that loperamide is the first-line antidiarrheal agent for elderly patients once adequate hydration is achieved, but should be avoided in suspected inflammatory diarrhea or diarrhea with fever 7
The Infectious Diseases Society of America suggests that ondansetron may be given to facilitate tolerance of oral rehydration in patients with vomiting, but only after adequate hydration is achieved 7
The American College of Gastroenterology recommends that probiotics may reduce symptom severity and duration in immunocompetent elderly patients with infectious or antimicrobial-associated diarrhea 7

The Centers for Disease Control and Prevention recommend that gloves and gowns should be used in the care of patients with diarrhea, and that alcohol-based sanitizers or soap and water should be used for hand hygiene 7
The World Health Organization recommends that asymptomatic elderly patients in high-risk settings should be treated according to local public health guidance 7