Which sign is most associated with hypermagnesemia?

Which sign is most associated with hypermagnesemia?

• A. Sedated appearance
• B. Increased deep tendon reflexes
• C. Hyperactive signs and tremors
• D. Seizures

Answer: (A)

Elevated magnesium levels dampen nerve and muscle activity, so signs shift toward CNS depression and reduced reflexes. A sedated appearance happens because high magnesium depresses central nervous system function and lowers neuromuscular excitability, leading to lethargy and decreased reflexes. In contrast, increased deep tendon reflexes, hyperactivity with tremors, or seizures are more typical of magnesium deficiency or very low magnesium, where neurons become more excitable. So the sedation is the sign most closely associated with hypermagnesemia.

Elevated magnesium levels dampen nerve and muscle activity, so signs shift toward CNS depression and reduced reflexes. A sedated appearance happens because high magnesium depresses central nervous system function and lowers neuromuscular excitability, leading to lethargy and decreased reflexes. In contrast, increased deep tendon reflexes, hyperactivity with tremors, or seizures are more typical of magnesium deficiency or very low magnesium, where neurons become more excitable. So the sedation is the sign most closely associated with hypermagnesemia.