Magnesium Replacement Monitoring

Magnesium replacement monitoring balances correction of deficiency against prevention of treatment-related toxicity. Serum magnesium, kidney function, clinical findings, and the response to each prescribed dose must be interpreted together. A laboratory result cannot replace assessment: falling deep-tendon reflexes, worsening weakness, hypotension, altered cardiac conduction, sedation, or respiratory depression may indicate excess magnesium. Practical nursing care centres on verifying the authorized order, checking the client and relevant laboratory results before administration, using the required infusion equipment, reassessing during treatment, documenting the response, and responding to deterioration. Dose selection and diagnosis remain with the authorized prescriber. The safest action depends on whether the client has persistent deficiency, impaired magnesium excretion, or evidence of toxicity.