Magnesium is an essential mineral responsible for over 300 biochemical reactions in the human body, from regulating muscle and nerve function to supporting a healthy immune system. Because of its wide-ranging benefits, magnesium supplements, sprays, and bath salts are incredibly popular. However, while rare, it is entirely possible to have too much of a good thing.
An abnormally high level of magnesium in the blood is a medical condition known as hypermagnesemia. If you suspect you have taken too much and are researching how to remove excess magnesium from body, it is vital to understand when you can manage it at home and when it constitutes a medical emergency.
Here is a comprehensive clinical guide from the experts at Cured Pharmacy on managing and treating high magnesium levels.
What Causes Hypermagnesemia?
In a healthy individual, the kidneys are highly efficient at filtering out and excreting excess magnesium through urine. Because of this, it is exceptionally difficult to develop hypermagnesemia simply from eating magnesium-rich foods like spinach, nuts, or seeds.
Excessive magnesium buildup typically occurs due to one of two reasons:
- Kidney Dysfunction: The most common cause of hypermagnesemia is chronic kidney disease (CKD) or acute kidney failure. When the kidneys cannot filter blood properly, magnesium accumulates to toxic levels.https://curedpharmacy.com/pages/how-to-remove-excess-magnesium-from-body
- Over-Supplementation: Taking massive doses of magnesium supplements, or overusing over-the-counter medications that contain high amounts of magnesium (such as certain laxatives and antacids), can overwhelm even healthy kidneys.
Recognising the Symptoms of Excess Magnesium
The symptoms of hypermagnesemia range from mild discomfort to life-threatening cardiac issues, depending on the concentration of magnesium in the blood.
| Severity | Common Symptoms | Clinical Urgency |
| Mild | Nausea, vomiting, facial flushing, lethargy, mild muscle weakness, urinary retention. | Consult a GP or pharmacist promptly. |
| Moderate | Low blood pressure (hypotension), irregular heartbeat, extreme drowsiness, loss of deep tendon reflexes. | Seek urgent medical assessment. |
| Severe | Muscle paralysis, severe respiratory depression (difficulty breathing), cardiac arrest. | Call 999 immediately. This is a medical emergency. |
How to Remove Excess Magnesium from Body
The approach to removing excess magnesium depends entirely on the severity of the toxicity and the underlying health of the patient’s kidneys.
1. At-Home Management (For Mild, Suspected Over-Supplementation)
If you have accidentally taken a double dose of a daily supplement and have normal kidney function, your body will likely correct the imbalance itself.
- Stop Intake Immediately: Cease taking all magnesium supplements, antacids, and laxatives containing magnesium.
- Hydrate: Drink plenty of water. Adequate fluid intake supports healthy kidney function, allowing your body to naturally flush out the excess mineral through urine.
2. Clinical Interventions (For Moderate to Severe Toxicity)
If a patient presents to the hospital with symptomatic hypermagnesemia, doctors utilize specific clinical protocols to protect the heart and force the magnesium out of the body.
- Intravenous (IV) Calcium: Calcium acts as a direct antagonist to magnesium. Administering IV calcium gluconate or calcium chloride helps stabilize the heart and immediately reverses the dangerous cardiac and neuromuscular effects of high magnesium.
- IV Fluids and Diuretics: To accelerate the removal of magnesium, doctors will often administer intravenous saline fluids alongside a loop diuretic (such as furosemide). This combination forces the kidneys to produce more urine and rapidly excrete the excess magnesium.
- Haemodialysis: If the patient has severe kidney failure and their body cannot excrete the magnesium even with fluids and diuretics, haemodialysis is required. This process uses a machine to artificially filter the blood, swiftly and effectively clearing the toxic magnesium levels.
Safe Supplementation Guidelines
To prevent the need for medical intervention, it is crucial to supplement safely. The NHS recommends that the daily intake of magnesium from supplements should not exceed 400mg per day for adults, unless specifically directed by a doctor.
Pro Tips for Safe Use:
- Always read the labels on antacids and laxatives, as many contain hidden, high doses of magnesium.
- If you have any form of kidney disease, you must never take a magnesium supplement without explicit approval from your specialist or GP.
- Consider transdermal options (like magnesium sprays or lotions) if you are looking for localized muscle relief, as they bypass the digestive system and are less likely to cause systemic spikes.
If you are unsure about your current supplement regimen, the clinical team at Cured Pharmacy is always available to help you navigate safe dosages and identify potential interactions with your current medications.
