What is the recommended clinical intervention for lithium overdose?

What is the recommended clinical intervention for lithium overdose?

• A. Activated charcoal
• B. Dialysis
• C. Intravenous lipid emulsion therapy
• D. Oral rehydration alone

Answer: (B)

Lithium overdose is best managed by rapidly removing the toxin from the body with hemodialysis. Lithium is a small, water-soluble ion that is cleared by the kidneys, and in overdose or renal impairment its elimination slows, leading to rising levels and neurotoxic symptoms. Hemodialysis efficiently removes lithium from the blood because of its low molecular weight and lack of protein binding, and in many cases its use is necessary to achieve a rapid and substantial decrease in serum levels; sometimes multiple dialysis sessions are needed due to redistribution of lithium from tissues after dialysis. Activated charcoal isn’t effective for lithium because it is not well adsorbed and decontamination yields little benefit once absorption has occurred. Intravenous lipid emulsion therapy is reserved for lipophilic toxins and isn’t indicated for lithium. Oral rehydration, while supportive for kidney function, does not adequately reduce lithium levels in a significant overdose.

Lithium overdose is best managed by rapidly removing the toxin from the body with hemodialysis. Lithium is a small, water-soluble ion that is cleared by the kidneys, and in overdose or renal impairment its elimination slows, leading to rising levels and neurotoxic symptoms. Hemodialysis efficiently removes lithium from the blood because of its low molecular weight and lack of protein binding, and in many cases its use is necessary to achieve a rapid and substantial decrease in serum levels; sometimes multiple dialysis sessions are needed due to redistribution of lithium from tissues after dialysis.

Activated charcoal isn’t effective for lithium because it is not well adsorbed and decontamination yields little benefit once absorption has occurred. Intravenous lipid emulsion therapy is reserved for lipophilic toxins and isn’t indicated for lithium. Oral rehydration, while supportive for kidney function, does not adequately reduce lithium levels in a significant overdose.