Medically reviewed on December 9, 2016
What is Mag64?
Calcium and magnesium are naturally occurring minerals that are necessary for many systems in the body.
Calcium is needed for bone formation and maintenance. Magnesium helps maintain muscle function and normal heart rhythm.
Mag64 is a combination medicine used as a supplement. This medicine is given when your diet does not provide enough of these minerals, or when they are lost through perspiration.
Mag64 may also be used for purposes not listed in this medication guide.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
Before taking this medicine
You should not use this medicine 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 it is safe for you to use this medicine if you have other medical conditions, especially:
history of kidney stones;
heart disease; or
a blockage in your intestines.
Ask a doctor before using this medicine if you are pregnant or breast-feeding. Your dose needs may be different during pregnancy or while you are nursing.
Your dose needs may be different during pregnancy or while you are nursing.
How should I take Mag64?
Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.
Do not crush, chew, or break a delayed-release or an enteric coated tablet. Swallow it whole. The enteric coated pill has a special coating to protect your stomach. Breaking the pill will damage this coating.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Since Mag64 is used when needed, you may not be on a dosing schedule. If you are on a schedule, use the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not use extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Mag64?
Avoid taking other medicines at the same time you take Mag64. Calcium carbonate can make it harder for your body to absorb certain drugs, making them less effective. Take your other medicines at least 2 hours before or 2 hours after you take this medicine.
Mag64 side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using Mag64 and call your doctor at once if you have:
muscle pain or weakness, joint pain;
confusion, feeling tired or restless; or
slow heart rate, drowsiness, feeling light-headed.
Common side effects may include:
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.
See also: Side effects (in more detail)
What other drugs will affect Mag64?
Tell your doctor about all your current medicines and any you start or stop using, especially:
heart or blood pressure medicine; or
This list is not complete. Other drugs may interact with calcium carbonate and magnesium chloride, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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