The headline “NEVER Use Magnesium If You Are Taking Any of the Following Medications” is misleading because it is too absolute. Magnesium supplements are safe for many people, but they can interact with certain medications, so timing or medical supervision may be needed.
Medications that can interact with magnesium
- Certain antibiotics
- Magnesium can reduce the absorption of some antibiotics, making them less effective.
- Doctors often recommend taking magnesium and these antibiotics several hours apart.
- Thyroid hormone replacement
- Levothyroxine may not be absorbed properly if taken at the same time as magnesium.
- They are usually taken several hours apart.
- Bisphosphonates for osteoporosis
- Magnesium can interfere with the absorption of these medicines if taken together.
- Certain HIV medications
- Some antiviral medicines interact with magnesium-containing supplements or antacids and need to be separated in time.
- Some heart medications
- Magnesium may affect certain drugs used to treat abnormal heart rhythms or blood pressure, depending on the specific medication.
- Diuretics (“water pills”)
- Some diuretics lower magnesium levels, while others can increase magnesium levels. Your healthcare provider may monitor blood tests if needed.
Who should be especially cautious?
People with Chronic kidney disease may have difficulty clearing excess magnesium from the body, increasing the risk of dangerously high magnesium levels.
Before taking magnesium supplements
- Tell your healthcare provider or pharmacist about all prescription medicines, over-the-counter medicines, and supplements you use.
- Follow the recommended dose.
- If you take prescription medications, ask whether magnesium should be taken at a different time of day.
Do not stop either your medication or magnesium supplement based on an online headline alone. If you’re unsure whether magnesium is appropriate for you, a healthcare professional can review your medications and advise on safe use.
