Mag-Tab: Uses, How to Take It, and Important Safety Tips
Mag-Tab is an over-the-counter magnesium supplement used to help maintain or increase magnesium intake. Some labeled formulations can also work as a laxative or antacid, so check the package ingredients and directions before using it.
Use Mag-Tab only as directed on its label, and ask a doctor or pharmacist for personal advice if you take other medicines or have kidney or heart problems. Excessive magnesium can cause serious side effects.
Key facts at a glance
- RxNorm
- 218164
- Generic
- Mag-Tab
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy