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Magnesium chloride (injection)

Generic Name: Magnesium chloride (injection) [mag-NEE-see-um-KLOE-ride].
The Brand Names are: Chloromag, Mag 64, and Mag-SR.
Dosage Form: Injectable solution (200 mg/mL).
The Class of Drugs: Minerals and electrolytes.

What is Magnesium Chloride?

Magnesium is a naturally occurring mineral. Magnesium is essential for a variety of functions throughout the body but is particularly important for the nerves and muscles. Magnesium chloride can be used to treat or stop deficiencies in magnesium (a lack of magnesium that is naturally present within the human body). Magnesium chloride can also be used for other purposes that are not mentioned in this guide.

Side effects of Magnesium Chloride

See a doctor immediately. If you are experiencing warning signs of an allergic response, such as symptoms of hives, extreme dizziness, breathing difficulties, or swelling of your lips, face, and tongue.

Contact your family caregivers immediately. If you suffer from:

  • A feeling of lightheadedness, as if you're about to pass out.
  • The warmth of your body, sweating, or feeling cold.
  • Breathing that is weak or shallow, slow or shallow breathing.
  • A tingling sensation.

Common adverse reactions to magnesium chloride include:

  • The appearance of redness on your neck or face.

This is not an exhaustive list of all possible adverse effects. Others could happen. Consult your physician for advice regarding medical effects. You can report any side effects to the FDA at 1-800-FDA-1088.


Before you start using magnesium chloride, consult your doctor about your allergies or medical conditions, as well as all the medications you use or take, especially if you're breastfeeding or pregnant.

Before you take this drug

It is not recommended to treat magnesium chloride when you have an allergy to it or if you suffer from

  • Kidney disease.
  • Serious coronary heart condition.

Before you take magnesium chloride, inform your doctor about any allergies or medical conditions, as well as if you're breastfeeding or pregnant.

How to take magnesium chloride?

The doctor will examine your kidney function before you begin using magnesium chloride. Magnesium chloride can be given in a vein as an injection. The healthcare professional will give the injection. There are other medicines to prevent severe side effects or allergic reactions. Your blood pressure and breathing will be closely monitored both before and after every injection. It is possible that you require regular medical tests. Even if there are no symptoms, tests can aid your doctor in determining if the medication is effective.

Details on dosage

Usual Adult Dose for Hypomagnesemia:

1–40 grams by the intravenous route every day
Utilize the levels of magnesium in serums to determine the dosage.
Maximum rate: 3 mL/min
Refilling electrolytes in magnesium deficiency

Usual Adult Dose for Vitamin and Mineral Supplementation:

Recommended intake of dietary supplements (RDA) to take magnesium
Age 18 and male Age: 410 mg
18 years, female, 360 mg
between 19 and 30 Male between 19 and 30 years old, male
between 19 and 30 Female to 30 years, female
Age 31 and over Males over 31 years of age (age 31 and over): 402 mg
31 years or older Females 31 years and older, female
Tolerable upper intake (UL) for magnesium supplements: 350 mg

Usual Pediatric Dose for Vitamin and Mineral Supplementation:

Recommended daily intake (RDA) of magnesium
From birth to 6 months From birth to 6 months: 30 mg (adequate intake)
7-12 months 7 to 12 months: 75 mg (adequate intake)
1–3 year olds 1 to 3 years: 80 mg
From 4 to 8 years old 4–8 years: 130 mg
9 to 13 years old: 9 to 13 years: 240 mg
14–18 years old Males 14 to 18 years old, male
14–18 years old, female Females 14–18 years old: 360 mg
The tolerable level of intake (UL) for magnesium supplementation:
1–3 year olds 1 to 3 years: 65 mg
From 4 to 8 years old Age range: 4–8 years.
9–18 years: 350 mg

What happens if I miss a dose?

Because you'll receive magnesium chloride only in a controlled setting, you're less likely to skip the dose.

What happens if I overdose?

Because magnesium chloride is administered by a medical specialist in a medical setting, it is highly unlikely for an overdose to occur.

What should be avoided?

Follow your doctor's advice regarding the food or beverages.

Interaction with other drugs

Other medications may interact with magnesium chloride, such as medications that are prescribed and available over the counter, vitamins, and herbal remedies. Discuss with your physician your current medications as well as any medications you are about to start or stop taking.