[Neurotoxicity in long-term lithium therapy: an electroneurographic study]

Area of Science:

• Neurology
• Toxicology
• Neuroscience

Context:

• Lithium is a widely prescribed mood stabilizer for bipolar disorder.
• Long-term lithium use can have various side effects, but peripheral nerve effects are not well-established.
• This study investigates subclinical peripheral nerve changes in patients on chronic lithium therapy.

Purpose:

• To assess peripheral nerve function in patients undergoing long-term lithium treatment.
• To determine if there is a correlation between the duration of lithium therapy and nerve conduction abnormalities.
• To explore the potential neurotoxic mechanisms underlying these changes.

Summary:

• Pathological changes in peripheral nerve conduction were observed in 16 patients on long-term lithium therapy (mean duration 8.3 years).
• These nerve conduction abnormalities correlated significantly with the duration of lithium treatment.
• No patients exhibited clinical signs of polyneuropathy or other associated conditions, indicating subclinical changes.

Impact:

• This research highlights a potential chronic neurotoxic effect of lithium on peripheral nerves.
• It suggests the need for monitoring peripheral nerve function in patients on long-term lithium therapy.
• Findings may inform clinical practice regarding lithium's long-term safety profile.