hypermagnesemia

Key facts

Medical condition (new).differential: Kidney failure, high blood calcium, high blood potassium, hypoparathyroidism, hypothyroidism, lithium toxicity, red blood cell breakdown, rhabdomyolysis
Medical condition (new).treatment: Calcium chloride, intravenous normal saline with furosemide, hemodialysis
Medical condition (new).frequency: Uncommon
Medical condition (new).name: Hypermagnesemia
Medical condition (new).synonyms: Magnesium toxicity
Medical condition (new).image: Mg-TableImage.svg
Medical condition (new).caption: Magnesium
Medical condition (new).field: Endocrinology
Medical condition (new).symptoms: Weakness, confusion, decreased breathing rate
Medical condition (new).complications: Cardiac arrest
Medical condition (new).causes: Kidney failure, treatment induced, tumor lysis syndrome, seizures, prolonged ischemia
Medical condition (new).diagnosis: Blood level > 1.1 mmol/L (2.6 mg/dL)

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Commons category: Hypermagnesemia
NCI Thesaurus ID: C37969

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Article

11 sections

Contents

Signs and symptoms
Complications
Causes
Predisposing conditions
Metabolism
Diagnosis
Treatment
Prognosis
Epidemiology
References
External links

Hypermagnesemia is an electrolyte disorder in which there is a high level of magnesium in the blood. Symptoms include weakness, confusion, decreased breathing rate, and decreased reflexes. Hypermagnesemia can greatly increase the chances of adverse cardiovascular events. Complications may include low blood pressure and cardiac arrest.

It is typically caused by kidney failure or is treatment-induced such as from antacids or supplements that contain magnesium. Less common causes include tumor lysis syndrome, seizures, and prolonged ischemia. Diagnosis is based on a blood level of magnesium greater than 1.1 mmol/L (2.6 mg/dL). It is severe if levels are greater than 2.9 mmol/L (7 mg/dL). Specific electrocardiogram (ECG) changes may be present.