A client is taking lithium. The nurse should be aware of the importance of which nursing intervention(s)? Select all that apply

Lithium is a mood stabilizer widely used in the management of bipolar disorder, particularly for preventing manic and depressive episodes. Because it has a narrow therapeutic range, patients are at risk for toxicity if blood levels fluctuate due to dehydration, drug interactions, or dietary changes. Nurses must closely monitor clients and provide teaching to ensure safety, adherence, and therapeutic effectiveness.

A. Observe the patient for motor tremors — Tremors are one of the earliest and most common signs of lithium toxicity, often appearing before severe symptoms like ataxia, confusion, or seizures. Tremors can indicate even mild elevations in lithium levels and may be exacerbated by stress, fatigue, or changes in hydration. Regular neurological assessments allow the nurse to intervene promptly, adjust therapy if needed, and prevent progression to life-threatening toxicity.

B. Monitor the patient for orthostatic hypotension — Lithium can cause fluid shifts and mild hypotension, especially in older adults or clients on diuretics. Monitoring blood pressure in different positions helps prevent falls, dizziness, and injuries, which are critical considerations in safe patient care.

E. Advise the patient to avoid caffeinated foods and beverages — Caffeine can increase renal excretion of lithium, potentially lowering blood levels and decreasing effectiveness. Clients should be educated on maintaining consistent caffeine intake to avoid fluctuations.

F. Teach the patient to take lithium with meals to decrease gastric irritation — Lithium can cause nausea, vomiting, and diarrhea if taken on an empty stomach. Taking it with food reduces gastrointestinal discomfort and improves medication adherence.

C. Draw lithium blood levels immediately after a dose — Accurate lithium monitoring requires blood to be drawn 12 hours after the last dose. Drawing levels immediately post-dose can give falsely elevated results, leading to unnecessary dose adjustments or alarm.

D. Advise the patient to drink 750 mL/d of fluid in hot weather — Lithium therapy requires maintaining adequate hydration (A.5–3 L/day) to prevent concentration changes and toxicity. 750 mL is insufficient, especially in hot weather or with increased activity.

Take-Home Points:

• Monitor closely for early signs of lithium toxicity, such as tremors, GI upset, and cognitive changes.
• Ensure adequate hydration and dietary consistency to maintain therapeutic lithium levels.
• Provide patient education on timing, meal administration, and avoiding substances that alter lithium excretion.