What is the recommended treatment for a child with diarrhea?

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Last updated: September 26, 2025View editorial policy

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Treatment for Children with Diarrhea

The recommended first-line treatment for a child with diarrhea is oral rehydration solution (ORS), with specific fluid volumes based on age (50-100 mL after each stool for children under 2 years, 100-200 mL for older children), along with early reintroduction of age-appropriate diet. 1

Rehydration Therapy

Oral Rehydration Solution (ORS)

  • Use reduced osmolarity ORS as first-line therapy for mild to moderate dehydration 1
  • The American Gastroenterological Association recommends standard glucose-electrolyte ORS with:
    • 75-90 mEq/L of sodium
    • 20 mEq/L of potassium
    • 65-80 mEq/L of chloride
    • 10 mEq/L of citrate
    • 75-111 mmol/L of glucose (2-2.5%) 1
  • Dosing recommendations:
    • Children under 2 years: 50-100 mL after each loose stool
    • Children over 2 years: 100-200 mL after each loose stool 1

Monitoring Hydration

  • Assess for signs of dehydration including:
    • General appearance
    • Eyes (sunken or not)
    • Mucous membranes (dry or moist)
    • Tears (present or absent)
    • Capillary refill time
    • Urine output
    • Vital signs, especially heart rate and blood pressure 1

Dietary Management

  • Resume age-appropriate diet during or immediately after rehydration
  • Offer food every 3-4 hours
  • Avoid foods high in simple sugars and fats 1
  • Consider dietary modifications:
    • Stop lactose-containing products if suspected lactose intolerance
    • Reduce insoluble fiber intake
    • Ensure adequate clear fluid intake (8-10 large glasses daily for older children) 1

Medications

Antimotility Agents

  • Loperamide (Imodium) should NOT be given to children under 12 years of age with acute diarrhea 1, 2
  • The FDA label clearly states loperamide is not for use in children under 12 years 2

Antibiotics

  • Only indicated for specific bacterial pathogens
  • First-line treatments for confirmed bacterial pathogens:
    • Shigella: Azithromycin
    • Campylobacter: Azithromycin
    • Enterotoxigenic E. coli (ETEC): TMP-SMX (if susceptible) or Azithromycin
    • Bacterial gastroenteritis: Third-generation cephalosporin or Azithromycin 1

Other Medications

  • Antipyretics may be used for high fever
  • Antiparasitic drugs only if intestinal parasites are confirmed
  • Probiotics may be considered as adjunctive therapy 3
  • Avoid unnecessary use of:
    • Antiemetics
    • Antidiarrheals
    • Spasmolytics
    • Intestinal antiseptics 3

Prevention and Follow-up

Prevention

  • Emphasize proper hand hygiene
  • Rotavirus vaccination is recommended to prevent rotavirus gastroenteritis 1

When to Seek Medical Attention

  • No improvement within 48 hours
  • Worsening symptoms
  • Development of warning signs:
    • Severe vomiting
    • Persistent dehydration despite ORS
    • Persistent fever
    • Abdominal distension
    • Blood in stool 1

Common Pitfalls to Avoid

  1. Inappropriate use of antimotility drugs: Loperamide and other antimotility agents are contraindicated in children under 12 years 1, 2

  2. Overuse of antibiotics: Antibiotics should only be used for specific bacterial pathogens, not for all cases of diarrhea 1, 3

  3. Delaying reintroduction of food: Early feeding during or immediately after rehydration is recommended, not prolonged fasting 1

  4. Using inappropriate ORS concentrations: Using solutions with high glucose content or hyperosmolar foods can worsen outcomes 4

  5. Failing to recognize dehydration: Careful assessment of hydration status is crucial for appropriate management 1

References

Guideline

Fluid Replacement Guidelines

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

Research

Acute Diarrhea in Children.

Srpski arhiv za celokupno lekarstvo, 2015

Research

[Sodium concentrations in solutions for oral rehydration in children with diarrhea].

Boletin medico del Hospital Infantil de Mexico, 1990

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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