The nurse provides discharge teaching to a client taking maintenance lithium. Which statement by the client indicates correct understanding?
1I will limit myself to a few sips of water each day so lithium is not washed out.
2If I miss a dose, I will take two doses at the next scheduled time.
3I can use ibuprofen regularly because it does not change lithium clearance.
4I will keep salt and fluids consistent and call the clinic during a fluid-losing illness.✓ Correct answer
Explanation
Stable sodium and fluid intake supports predictable renal lithium clearance. Vomiting, diarrhea, fever, or heavy sweating can cause dehydration or sodium loss and increase lithium toxicity risk, so the client should contact the treatment team promptly for individualized sick-day instructions. Fluid restriction, doubled doses, and routine NSAID use can raise risk and should not be undertaken independently.
Clinical reasoning The kidney handles lithium in relation to sodium and volume status. Sodium loss and dehydration promote lithium retention, while NSAIDs can reduce renal clearance.
Decision rule Maintain a normal, consistent salt and fluid intake and seek prompt guidance during fluid-losing illness or before starting interacting medications.
Scenario Discharge education for lithium.
Sodium consistency — Maintaining a stable normal sodium intake helps prevent changes in renal lithium reabsorption and serum concentration.
Lithium sick-day teaching — Vomiting, diarrhea, fever, or heavy sweating requires prompt clinical guidance because volume and sodium loss can increase toxicity risk.
Missed dose safety — Do not double lithium doses. Follow the prescribed missed-dose instructions or contact the clinic.