A patient's serum lithium level is 1.8 mEq/L.What is the nurse's priority action related to this evidence?

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A serum lithium level of 1.8 mEq/L is above the therapeutic range and indicates potential for toxicity. Therefore, the priority action for the nurse is to assess for signs of toxicity such as gastrointestinal disturbances, tremors, confusion, and arrhythmias. Restricting fluid intake and encouraging high-potassium foods are not relevant actions in this situation. Ensuring that the patient is swallowing the capsules may be necessary, but it is not the priority action at this time.

A Patient's Serum Lithium Level Is 1