What is the recommended dosage of Maalox (aluminum hydroxide/magnesium hydroxide) for adults and for children aged 2–12 years?

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Last updated: October 27, 2026 • View editorial policy

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Maalox Dosage Recommendations

For adults and children 12 years and older, take 2-4 teaspoons (10-20 mL) up to 4 times daily; for children under 12 years, consult a physician before use. 1

Adult and Adolescent Dosing (≥12 years)

  • Standard dose: 2-4 teaspoons (10-20 mL) per dose
  • Frequency: Up to 4 times daily
  • Maximum daily dose: Do not exceed 16 teaspoons (80 mL) in 24 hours 1
  • Duration: Do not use maximum dosage for more than 2 weeks unless directed by a physician 1
  • Administration: Shake well before using 1

Pediatric Dosing (Under 12 years)

Physician consultation is required before administering Maalox to children under 12 years of age. 1 The FDA labeling does not provide specific pediatric dosing for this age group, making medical supervision essential for safe use.

Critical Safety Considerations

Contraindications and Precautions

  • Kidney disease: Consult physician before use 1
  • Magnesium-restricted diet: Consult physician before use 1
  • Drug interactions: Antacids may interact with prescription medications; consult pharmacist or physician if taking other drugs 1

Common Pitfalls to Avoid

  1. Exceeding maximum daily dose: The 80 mL/24-hour limit is absolute and should not be exceeded
  2. Prolonged use at maximum dose: Using maximum dosage beyond 2 weeks without medical supervision can lead to electrolyte imbalances
  3. Pediatric use without guidance: Never dose children under 12 without physician direction, as aluminum and magnesium absorption varies by age and weight

The FDA labeling provides clear, evidence-based dosing that prioritizes safety by limiting total daily exposure and requiring medical oversight for vulnerable populations (children and those with renal impairment).

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.