What is the recommended dosage of Mylanta (aluminum hydroxide, magnesium hydroxide, simethicone) for adults and children over 12 years old?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: October 25, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

Mylanta Dosage for Adults and Children Over 12 Years Old

For adults and children over 12 years old, the recommended dosage of Mylanta (aluminum hydroxide, magnesium hydroxide, simethicone) is 2 teaspoonfuls 5-6 times daily after meals and at bedtime, followed by a sip of water if needed. 1

Dosing Guidelines

  • The medication should be shaken well before using to ensure proper distribution of active ingredients 1
  • Do not exceed 12 teaspoonfuls in a 24-hour period 1
  • Maximum dosage should not be used for more than 2 weeks 1
  • Doses are typically taken after meals and at bedtime for maximum effectiveness 1

Administration Considerations

  • Following each dose with a sip of water can help ensure complete delivery of the medication 1
  • Mylanta works by neutralizing stomach acid and reducing gas in the digestive tract 2
  • The aluminum/magnesium hydroxide formulation in Mylanta has been shown to effectively increase gastric pH 2
  • The duration of action in the stomach is approximately 26 minutes, while effects on the esophagus may last up to 82 minutes 2

Special Considerations

  • Patient-specific factors such as weight and age should be considered when determining appropriate dosing 3
  • For elderly patients or those with renal impairment, dosage adjustments may be necessary 3
  • If symptoms persist despite appropriate dosing, further medical evaluation is recommended 3

Cautions

  • Aluminum-containing antacids may interact with certain medications, potentially affecting their absorption 4
  • Antacids should be separated from other medications by at least 2 hours to prevent potential interactions 4
  • Long-term use of aluminum-containing antacids should be avoided in patients with renal impairment 3

Remember that while Mylanta provides symptomatic relief for acid-related conditions, it does not address underlying causes. If symptoms persist beyond two weeks despite proper dosing, medical consultation is recommended.

References

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.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.