Slurred speech and somnolence occur at which magnesium level range?

Slurred speech and somnolence occur at which magnesium level range?

• A. 5-8 mg/dL
• B. 5-10 mg/dL
• C. 8-12 mg/dL
• D. 10-12 mg/dL

Answer: (D)

Magnesium toxicity progresses with increasing serum magnesium, and neurological depression becomes evident as levels rise. Slurred speech and somnolence are signs of significant CNS depression and align with higher toxicity. Normal magnesium is about 1.5–2.5 mg/dL, and while mild elevations can cause fatigue or nausea, the combination of slurred speech and marked drowsiness typically occurs when levels reach around 10–12 mg/dL. This is the range where clinicians expect noticeable central nervous system effects, indicating closer monitoring and likely discontinuation of magnesium therapy.

Magnesium toxicity progresses with increasing serum magnesium, and neurological depression becomes evident as levels rise. Slurred speech and somnolence are signs of significant CNS depression and align with higher toxicity. Normal magnesium is about 1.5–2.5 mg/dL, and while mild elevations can cause fatigue or nausea, the combination of slurred speech and marked drowsiness typically occurs when levels reach around 10–12 mg/dL. This is the range where clinicians expect noticeable central nervous system effects, indicating closer monitoring and likely discontinuation of magnesium therapy.