What is the therapeutic Lithium level range?

What is the therapeutic Lithium level range?

• A. 1.5 - 2.5
• B. 0.6 - 1.2 mEq/L
• C. 0.1 - 0.3
• D. 2.0 - 3.0

Answer: (B)

Lithium works best when its level in the blood stays within a narrow window, because it has a small safety margin. For long-term mood stabilization in bipolar disorder, the recommended serum concentration is about 0.6 to 1.2 mEq/L. This range is high enough to have a therapeutic effect but low enough to minimize toxicity. Levels below this range are usually not effective, while levels well above it—especially around 1.5–2.0 mEq/L and higher—carry a real risk of toxicity, with symptoms like tremor, confusion, and coordination problems. So the 0.6–1.2 mEq/L range is the correct target. The other ranges are either subtherapeutic or dangerous.

Lithium works best when its level in the blood stays within a narrow window, because it has a small safety margin. For long-term mood stabilization in bipolar disorder, the recommended serum concentration is about 0.6 to 1.2 mEq/L. This range is high enough to have a therapeutic effect but low enough to minimize toxicity. Levels below this range are usually not effective, while levels well above it—especially around 1.5–2.0 mEq/L and higher—carry a real risk of toxicity, with symptoms like tremor, confusion, and coordination problems. So the 0.6–1.2 mEq/L range is the correct target. The other ranges are either subtherapeutic or dangerous.