Lithium toxicity after Roux-en-Y bariatric surgery

Area of Science:

• Pharmacology
• Gastroenterology
• Nephrology

Background:

• Lithium carbonate is a common treatment for bipolar disorder.
• Patients with morbid obesity, diabetes mellitus, and diabetes insipidus may require careful medication management.
• Roux-en-Y gastric bypass surgery can impact drug absorption.

Purpose of the Study:

• To highlight the potential for altered lithium absorption after Roux-en-Y gastric bypass.
• To emphasize the risk of lithium toxicity in patients undergoing bariatric surgery.

Main Methods:

• Case report of a 61-year-old woman with bipolar disorder on lithium carbonate.
• Monitoring of lithium levels before and after Roux-en-Y bypass surgery.
• Clinical observation of lithium toxicity symptoms post-surgery.

Main Results:

• Lithium levels increased from 0.61 mEq/L to 1.51 mEq/L post-surgery despite no change in dosage.
• The patient presented with signs and symptoms of lithium toxicity.
• Dose reduction and supportive care were required for treatment.

Conclusions:

• Bariatric surgery can cause unpredictable changes in drug absorption.
• Close monitoring of lithium levels is essential after gastric bypass surgery.
• Clinicians must be aware of potential drug toxicity following bariatric procedures.