Question: what are toxic lithium levels?
Answer: A safe blood level of lithium is 0.6 and 1.2 milliequivalents per liter (mEq/L). Lithium toxicity can happen when this level reaches 1.5 mEq/L or higher. Severe lithium toxicity happens at a level of 2.0 mEq/L and above, which can be life-threatening in rare cases.