On this page · 10 sections
Minerals and electrolytes oral tablet, extended release (84 mg)

Magnesium lactate

Generic name: magnesium lactate

Brand names: Mag-Tab SR

Last updated November 2, 2026 0 views
Share

What is magnesium lactate?

Magnesium lactate is a natural mineral that the body needs to help the heart, nervous system, and digestive system work properly.

Magnesium lactate is used as a mineral supplement to treat magnesium deficiency.

Magnesium lactate may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take magnesium lactate?

Use exactly as directed on the label, or as your doctor prescribes. Do not use in larger or smaller amounts or for longer than recommended.

Magnesium lactate may be taken with food if it makes your stomach upset or causes diarrhea.

Take the medicine at the same time each day.

Do not crush or chew an extended-release tablet. Swallow it whole. To make swallowing easier, you may break the tablet in half.

Magnesium lactate may be only part of a complete treatment program that also includes a special diet. Follow the diet plan created for you by your doctor or nutrition counselor. Get familiar with the list of foods you should eat to ensure you get enough magnesium in your diet. This may include green leafy vegetables, peas, beans, nuts, and whole grain cereals.

The recommended dietary allowance of magnesium increases with age. Follow your healthcare provider's instructions. You may also consult the Office of Dietary Supplements of the National Institutes of Health, or the U.S. Department of Agriculture (USDA) Nutrient Database (formerly "Recommended Daily Allowances") listings for more information.

Use magnesium lactate regularly to get the most benefit. Get your prescription refilled before you run out of medicine completely.

Do not share magnesium lactate with another person.

Store at room temperature away from moisture, heat, and light. Keep the bottle tightly closed when not in use.

This section was rewritten for readability and reviewed for meaning.

Warnings

Follow all instructions on your medicine label and package. Check with a doctor or pharmacist to see if it is safe for you to take magnesium lactate if you have other medical conditions.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use magnesium lactate if you are allergic to it.

Ask a doctor or pharmacist if it is safe for you to take this medicine if you have other medical conditions, especially:

  • kidney disease;
  • heart disease;
  • if you are allergic to animals, food dyes, or other medicines;
  • if you take a blood thinner (warfarin, Coumadin, Jantoven); or
  • if you take an antibiotic (Cipro, Levaquin, penicillamine, Cuprimine, and others).

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.

Do not give this medicine to a child without medical advice.

This section was rewritten for readability and reviewed for meaning.

Magnesium lactate 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.

Common side effects of magnesium lactate may include:

  • diarrhea;
  • bloating, gas; 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.

This section was rewritten for readability and reviewed for meaning.

Magnesium lactate dosing information

Usual Adult Dose for Dietary Supplement:

1 to 2 caplets every 12 hours with food

What happens if I miss a dose?

Take the missed dose as soon as you remember. If it is almost time for your next scheduled dose, skip the missed dose. Do not take extra medicine to make up for the missed dose.

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.

Overdose symptoms may include confusion, dizziness, extreme drowsiness, slow heart rate, muscle weakness, or loss of consciousness.

Avoid eating foods that are high in fat. High-fat foods can make it harder for your body to absorb magnesium lactate.

Do not take any other vitamin or mineral supplements that contain magnesium unless your doctor has told you to.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect magnesium lactate?

Other drugs may interact with magnesium lactate, including prescription and over-the-counter medicines, vitamins, and herbal products. Inform all your health care providers about all medicines you are currently using and any medicines you start or stop using.

This section was rewritten for readability and reviewed for meaning.

Common questions about magnesium lactate

When is the best time to take magnesium, morning or night?
The best time of day to take magnesium depends on your health goals and individual needs. While timing can enhance specific benefits, maintaining a consistent routine is more important for stable magnesium levels in the body. Many studies show the full benefits of magnesium occur after long-term use. Continue reading
Should I take magnesium with or without food?
It is generally recommended to take magnesium with food to help lower the chances for an upset stomach and increase the absorption of the mineral into your body. If you take magnesium on an empty stomach, you increase the risk for common stomach side effects like diarrhea, nausea and abdominal cramping. Continue reading
Does magnesium help with migraines and headaches?
The current evidence supports a role for magnesium in both the prevention and treatment of headache disorders, particularly migraines. Continue reading

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.
General medicine information Consumer-friendly language

Content is provided for education and is not medical advice. See our medical disclaimer.