Hypermagnesemia is a pathological condition characterized by an increase in the concentration of magnesium in the blood serum of more than 1.1 mmol / l. The most common cause of this deviation is kidney disease with impaired excretory function, taking magnesium-containing drugs. Clinical manifestations include depression of the nervous system, decreased muscle tone and blood pressure. The level of magnesium is examined during a biochemical blood test. Treatment of this condition is to eliminate the cause, the introduction of calcium preparations, isotonic solutions and diuretics.