What action is appropriate when the lithium level is 1.3 mEq/L?

• A. Hold next dose and assess for symptoms
• B. Administer the next dose
• C. Increase the dose by 25%
• D. Discontinue lithium permanently

Answer: (A)

Lithium works with a very narrow therapeutic window, so every rise above the target range increases the risk of toxicity. For many patients, the therapeutic trough is about 0.6–1.2 mEq/L, and a level of 1.3 mEq/L is slightly elevated. If the patient shows no symptoms, the safest immediate step is to hold the next dose to prevent further accumulation and reassess soon. Recheck the serum level (often within 24 hours) and look for any early signs of toxicity, such as tremor, GI upset, fatigue, or confusion. Ensuring adequate hydration and normal sodium intake is also important, since dehydration or shifts in sodium can raise lithium levels. Discontinuing lithium permanently isn’t indicated for a mild elevation, and increasing the dose would risk worsening the level. If symptoms or the level trend upward, escalate management per protocol.