What is the current evidence on hypermagnesemia in PN patients?

• A. There are no reports of hypermagnesemia in PN patients
• B. There are several published reports of hypermagnesemia, some symptomatic, and some not, in patients on long-term PN
• C. It occurs only in liver failure
• D. It is always asymptomatic

Answer: (B)

Magnesium management in PN shows that hypermagnesemia has been reported in parenteral nutrition patients. There are multiple published reports documenting elevated magnesium levels in individuals on long-term PN. Some of these cases are symptomatic, with effects such as hypotension, bradycardia, or diminished reflexes, while others are asymptomatic despite higher levels. This demonstrates that hypermagnesemia can occur in PN and is not confined to a single condition like liver failure, nor is it always without symptoms. Clinicians monitor serum magnesium and adjust PN magnesium dosing, particularly in patients with reduced renal function, to prevent or treat hypermagnesemia.