How to Calculate Magnesium Hydroxide 400 mg/5 mL Dose

This calculator determines the Magnesium Hydroxide dose for treating constipation or indigestion, using a concentration of Magnesium Hydroxide 400 mg/5 mL (80 mg/mL), based on the patient’s age group:

Dose in mL and mg (based on Magnesium Hydroxide):

Where:

• Age Group: Select the appropriate age group (2 to <6 years, 6 to <12 years, or ≥12 years and adults).
• Concentration: Magnesium Hydroxide 400 mg/5 mL (80 mg/mL).

Administer as prescribed for constipation or indigestion. ⚠️ Always consult a healthcare provider.

Using the Magnesium Hydroxide 400 mg/5 mL Dosage Calculator

Choose the patient’s age group and click "Calculate." The calculator provides the dose in mL and mg (Magnesium Hydroxide) based on the selected age group.

Example: Age 2 to <6 years:

Dosage:
5 to 15 mL (400 to 1200 mg) po per day in single or divided doses. 
[Maximum daily dose: 15 mL (1200 mg) per day]

Calculations must be re-checked and should not be used alone...
            

Consult a healthcare provider before administering.

Frequently Asked Questions (FAQ)

1. What is Magnesium Hydroxide used for?

Magnesium Hydroxide (Milk of Magnesia) is used to treat constipation and indigestion (heartburn).

2. How often is this given?

Age 2 to <6 years: 5 to 15 mL (400 to 1200 mg) po per day in single or divided doses (max 15 mL/1200 mg/day). Age 6 to <12 years: 15 to 30 mL (1200 to 2400 mg) po per day (max 30 mL/2400 mg/day). Age ≥12 years and adults: 30 to 60 mL (2400 to 4800 mg) po per day (max 60 mL/4800 mg/day).

3. Can this be used for children under 2 years?

Consult a doctor, as Magnesium Hydroxide is not typically recommended for children under 2 years without medical supervision.

4. What’s the maximum daily dose for adults?

The maximum daily dose for adults (≥12 years) is 60 mL (4800 mg) per day.