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Discharge Instructions for Hypomagnesemia (Child)

Your child has too little magnesium in the blood, a condition called hypomagnesemia. Magnesium is a component of bone. It’s needed for muscles, nerves, and enzymes to do their jobs. Magnesium is also needed for many hormones to work. When your child’s magnesium levels are low, their calcium levels may be low too. Too little magnesium in the blood can lead to many symptoms and serious problems. These include seizures, abnormal heart rhythms, and trouble breathing. If severe enough, the heart can stop beating altogether. Your child may have been given treatment for the condition in the hospital. Here’s what you need to know about caring for your child at home.

Home care

  • Give your child foods that contain magnesium. These include:

    • Spinach.

    • Nuts.

    • Soy products.

    • Millet, wheat bran, and wheat germ.

    • Whole grain cereals (bran flakes, shredded wheat, and oatmeal).

    • Black beans or kidney beans.

    • Brown rice.

    • Avocados.

    • Bananas.

  • Give your child a magnesium supplement, or give a multivitamin with magnesium in it. Do this as directed by your child’s doctor.

  • Have your child’s magnesium levels checked often, as directed by your child's doctor. This is very important if your child is taking a diuretic. This is a medicine that keeps the body from retaining water.

  • Tell the doctor about all prescription and over-the-counter medicines your child takes. Some of them can decrease magnesium levels.

  • Give your child all medicines exactly as directed.

  • Learn to take your child’s pulse. Tell the doctor if your child’s pulse rate is higher than 120 beats per minute.

Follow up

  • Follow up with your doctor as advised.

  • Keep all follow-up appointments. Your child’s doctor needs to watch your child’s condition closely. This is even more important if another health problem is causing the hypomagnesemia.

When to contact your child’s doctor

Contact the doctor right away if your child has:

  • Muscle twitching, spasms, or cramps.

  • Dizziness.

  • Fatigue.

  • Weakness.

Call 911

Call 911 if your child has:

  • Confusion.

  • Fainting or loss of consciousness.

  • An irregular or fast heartbeat or racing pulse (higher than 120 beats per minute).

  • Chest pain.

  • Shortness of breath.

Online Medical Reviewer: Chelsey Schilling BSN RN
Online Medical Reviewer: Heather M Trevino BSN RNC
Date Last Reviewed: 6/1/2025
© 2000-2025 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
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