Lithium (Lithobid) is a mood stabilizer that is the drug of choice for patients with bipolar disorder. Its mechanism of action is altering cation transport in nerve and muscle, and influencing the reuptake of neurotransmitters. renal excretion of lithium is highly dependent on serum sodium levels and this is because the kidneys process lithium and sodium in the same way.
Lithium can cause many adverse effects on the kidneys including polyuria, glycosuria, renal toxicity, chronic interstitial nephritis, and glomerulonephritis. Long-term lithium therapy should be avoided if possible, and the dosage should be kept as low as possible to reduce renal damage. Kidney function (BUN, serum creatinine, creatinine clearance, urinalysis) should be assessed before starting treatment and at least once a year after. Lithium is contraindicated in patients with severe renal disease.
Other nursing considerations for this drug is to be aware of lithium levels if the patient is taking a diuretic concurrently. The nurse must monitor intake and output, and report any significant changes. Weight must be monitored every 3 months, and unless contraindicated, fluid intake should be about 2000 to 3000 mL a day. Important labs to monitor during therapy are renal and thyroid function, WBCs, serum electrolytes, adn glucose. It’s also really important to monitor lithium levels, making sure they stay in the therapeutic range, every 2 to 3 days during initial therapy and every 3 to 6 months during maintenance therapy.

