Clinical reference
Mineral supplement · Oral magnesium salt · Primary Care, Nephrology, Pediatrics
Magnesium oxide is an oral magnesium salt used for magnesium supplementation and for hypomagnesemia. Contains 60.32% elemental magnesium; 400 mg magnesium oxide equals 241.3 mg elemental Mg or 20 mEq Mg. Formulations (OTC): Tablets 100, 200, 250, 400, 420, 500 mg; Capsules 300, 500 mg. All doses below are expressed as magnesium oxide salt. Use with cautio…