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SlowMag Muscle + Heart

Generic name: calcium carbonate and magnesium chloride

Brand names: Mag64, MagDelay, Magnesium Chloride With Calcium, Nu-Mag, Slow Magnesium Chloride with Calcium, Slow-Mag, SlowMag Muscle + Heart

Last updated November 3, 2026 0 views
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What is SlowMag Muscle + Heart?

Calcium and magnesium are minerals that occur naturally. Calcium is important for building and keeping bones strong. Magnesium supports muscle function and helps maintain a normal heart rhythm.

SlowMag Muscle + Heart is a combination medicine used as a supplement. It is taken when your diet does not provide enough of these minerals or when they are lost through sweating.

SlowMag Muscle + Heart may also be used for other reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take SlowMag Muscle + Heart?

Use exactly as directed on the label, or as prescribed by your doctor.

Swallow the tablet whole and do not crush, chew, or break it.

Store at room temperature away from moisture and heat.

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Warnings

Follow all instructions on your medicine label and package. Inform each of your healthcare providers about all your medical conditions, allergies, and all medicines you are using.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use SlowMag Muscle + Heart if you have ever had an allergic reaction to an antacid or vitamin/mineral supplement that contains calcium carbonate or magnesium chloride.

Ask a doctor or pharmacist if this medicine is safe to use if you have:

  • kidney disease;
  • a history of kidney stones;
  • heart disease; or
  • a blockage in your intestines.

Ask a doctor before using this medicine if you are pregnant or breastfeeding. Your dose needs may be different during pregnancy or while you are nursing.

This section was rewritten for readability and reviewed for meaning.

SlowMag Muscle + Heart side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using SlowMag Muscle + Heart and call your doctor immediately if you have:

  • nausea, vomiting, stomach pain, loss of appetite, increased thirst or urination;
  • muscle pain or weakness, joint pain;
  • confusion, feeling tired or restless; or
  • slow heart rate, drowsiness, feeling light-headed.

Common side effects of SlowMag Muscle + Heart may include:

  • diarrhea;
  • constipation; or
  • upset stomach.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

Since SlowMag Muscle + Heart is used as needed, you might not have a regular dosing schedule. If you miss a dose and it's nearly time for your next dose, just skip the missed dose. Do not take two doses at the same time.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Avoid taking other medicines at the same time you take SlowMag Muscle + Heart.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect SlowMag Muscle + Heart?

Calcium carbonate can make it difficult for your body to absorb some medications, which can reduce their effectiveness. If you are taking other medicines, take your SlowMag Muscle + Heart dose 2 hours before or 2 hours after you take the other medicine.

Inform your doctor about all your other medicines, especially:

  • an antibiotic;
  • heart or blood pressure medicine; or
  • medicine for osteoporosis or Paget's disease of bone--Actonel, Boniva, Fosamax, Reclast, Zometa, and others.

This list is not complete. Other medications may affect SlowMag Muscle + Heart, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are mentioned here.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.