Magnesium Oxide Dosage
This dosage information may not include all the information needed to use Magnesium Oxide safely and effectively. See additional information for Magnesium Oxide.
The information at Drugs.com is not a substitute for medical advice. ALWAYS consult your doctor or pharmacist.
Usual Adult Dose for:
- Duodenal Ulcer
- Dyspepsia
- Gastric Ulcer
- Gastroesophageal Reflux Disease
- Hypomagnesemia
- Pathological Hypersecretory Disorder
- Renal Stones
- Constipation
Usual Pediatric Dose for:
Additional dosage information:
Usual Adult Dose for Duodenal Ulcer
Tablets: 400 to 800 mg (241 to 482 mg elemental magnesium) orally once a day.
Capsules: 140 mg (84 mg elemental magnesium) orally 3 to 4 times a day.
Usual Adult Dose for Dyspepsia
Tablets: 400 to 800 mg (241 to 482 mg elemental magnesium) orally once a day.
Capsules: 140 mg (84 mg elemental magnesium) orally 3 to 4 times a day.
Usual Adult Dose for Gastric Ulcer
Tablets: 400 to 800 mg (241 to 482 mg elemental magnesium) orally once a day.
Capsules: 140 mg (84 mg elemental magnesium) orally 3 to 4 times a day.
Usual Adult Dose for Gastroesophageal Reflux Disease
Tablets: 400 to 800 mg (241 to 482 mg elemental magnesium) orally once a day.
Capsules: 140 mg (84 mg elemental magnesium) orally 3 to 4 times a day.
Usual Adult Dose for Hypomagnesemia
Tablets: 400 to 800 mg (241 to 482 mg elemental magnesium) orally once a day.
Capsules: 140 mg (84 mg elemental magnesium) orally 3 to 4 times a day.
Usual Adult Dose for Pathological Hypersecretory Disorder
Tablets: 400 to 800 mg (241 to 482 mg elemental magnesium) orally once a day.
Capsules: 140 mg (84 mg elemental magnesium) orally 3 to 4 times a day.
Usual Adult Dose for Renal Stones
140 to 420 mg (84 to 252 mg elemental magnesium) orally once a day. Magnesium oxide has also been used in combination with pyridoxine to prevent recurrence of calcium oxalate renal calculi.
Usual Adult Dose for Constipation
Oral:
Caplets (500 mg): 2 to 4 caplets orally daily with a full 8 ounce glass of liquid.
Caplets may be taken all at bedtime or separately throughout the day.
Usual Pediatric Dose for Constipation
Oral:
12 years or older:
Caplets (500 mg): 2 to 4 caplets orally daily with a full 8 ounce glass of liquid.
Caplets may be taken all at bedtime or separately throughout the day.
Renal Dose Adjustments
Do not use without physician supervision in patients with renal impairment due to increased risk of hypermagnesemia.
Liver Dose Adjustments
Data not available
Dose Adjustments
The dose may be titrated as needed and tolerated to replete magnesium levels in nonemergent situations. Therapy should be reevaluated in 2 weeks or less.
Precautions
Because magnesium is primarily eliminated by the kidney, there is significant risk of hypermagnesemia in patients with renal dysfunction.
Dialysis
Data not available; however, use of magnesium salts is generally contraindicated in renal failure.
Other Comments
Coexistent hypocalcemia and hypokalemia may correct upon repletion of magnesium.
