8. Magnesium Toxicity: A Serious but Rare Complication

While rare, magnesium toxicity can occur when magnesium levels in the body become too high, usually as a result of excessive supplementation. Symptoms of magnesium toxicity can include muscle weakness, difficulty breathing, irregular heartbeat, and even coma in severe cases.
To avoid magnesium toxicity, it’s essential to follow the recommended dosage guidelines for magnesium oxide and consult your healthcare provider if you experience any unusual or concerning symptoms while taking the supplement. (8)