Skip to main content

Magnesium Citrate Dosage

Medically reviewed by Last updated on Jan 8, 2024.

Applies to the following strengths: 1.745 g/30 mL; 133.3 mg; 100 mg; 125 mg; 66.66 mg

Usual Adult Dose for:

Usual Pediatric Dose for:

Additional dosage information:

Usual Adult Dose for Constipation

240 mL orally one time.

Usual Pediatric Dose for Constipation

< 6 years: 0.5 mL/kg orally up to a maximum of 200 mL. May repeat every 4 to 6 hours until stools are clear.

6 to 12 years: 100 to 150 mL orally one time.

Renal Dose Adjustments

CrCl < 50 mL/min: Not recommended for use due to the high risk of hypermagnesemia in patients with renal dysfunction.

Liver Dose Adjustments

Data not available


Data not available

Other Comments

A semifluid or watery stool may be expected in < 6 hours.

Frequently asked questions

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.