Slideshows Images Quizzes
font size

Magnesium Chloride

Medical and Pharmacy Editor:

Brand Name: MgCl or MgCl2

Generic Name: Magnesium Chloride

Drug Class: Electrolytes

What Is Magnesium Chloride and How Does It Work?

Magnesium is a mineral that is important for normal bone structure in the body. People get magnesium from their diet, but sometimes magnesium supplements are needed if magnesium levels are too low. Dietary intake of magnesium may be low, particularly among women. Magnesium deficiency is also not uncommon among African Americans and the elderly. Low magnesium levels in the body have been linked to diseases such as osteoporosis, high blood pressure, clogged arteries, hereditary heart disease, diabetes, and stroke.

Foods that are high in fiber are generally high in magnesium.

Magnesium chloride is available under the following different brand names: MgCl or MgCl2.

Dosage of Magnesium Chloride:

Adult and Pediatric Dosages:

Injectable solution

  • 200 mg/5ml

Tablet, extended release

  • 535 mg ( 64 mg elemental)

Dosing Considerations – Should be Given as Follows:

Recommended Daily Average (Elemental Magnesium)

Males: 400-420 mg orally each day

Females 18-30

  • 310 mg orally each day
  • Pregnancy: 350 mg orally each day
  • Lactating: 310 mg orally each day

Females over 30

  • 320 mg/day
  • Pregnant women: 360 mg/day
  • Lactating women: 320 mg/day


  • Infants under 6 months: 30 mg/day
  • Infants 6-12 months: 75 mg/day
  • Children 1-3 years: 80 mg/day
  • Children 3-8 years: 130 mg/day
  • Children 8-13 years: 240 mg/day
  • Children 13-18 years: 410 mg/day (men); 360 mg/day (women); 400 mg/day (pregnant women); 360 mg/day (lactating women)


  • 4 g (in 250 ml D5W) intravenous infusion; no more than 3 ml/min
  • Usual range: 1-40 g intravenously each day
  • Use serum levels as guide to continue therapy
Medically Reviewed by a Doctor on 6/13/2017

Women's Health

Find out what women really need.

Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations

Health Solutions From Our Sponsors