⚠️ Taking Magnesium? These 2 Groups Need Extra Caution
Magnesium is an essential mineral, and magnesium from ordinary foods is generally safe. The concern is mainly with magnesium supplements, antacids, and laxatives, especially at high doses.
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1. People with kidney disease 🫘
This is the most important group to be cautious about. Healthy kidneys remove excess magnesium, but reduced kidney function can allow magnesium to accumulate in the blood. Very high levels can cause low blood pressure, weakness, breathing problems, abnormal heart rhythms, and, in severe cases, cardiac arrest.
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If you have chronic kidney disease or are on dialysis, don’t start a magnesium supplement without asking your doctor or pharmacist.
2. People taking certain medications 💊
Magnesium can interfere with the absorption of several medicines, including:
Certain antibiotics, including doxycycline, ciprofloxacin, and levofloxacin.
Oral bisphosphonates, such as alendronate, used for osteoporosis.
These medications often need to be separated from magnesium by several hours.
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Some diuretics and long-term proton-pump inhibitors can also change magnesium levels, so your healthcare professional may need to monitor you.
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How much is too much?
For adults, the U.S. NIH lists 350 mg per day as the upper limit for magnesium from supplements and medications, not including magnesium naturally present in food. Higher amounts may be appropriate when medically supervised.
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Bottom line: Don’t assume magnesium is dangerous for everyone taking medication. The biggest concerns are impaired kidney function and specific drug interactions. Before starting a supplement, have a pharmacist check your complete medication list.
If you tell me your age, magnesium type/dose, and the medications you’re taking, I can check for specific interactions.
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