Neuropsychiatric symptoms following bismuth intoxication

Area of Science:

• Pharmacology
• Neuroscience
• Toxicology

Background:

• Bismuth-containing medications are used for dyspeptic conditions.
• Neurotoxicity is a known, albeit rare, complication of bismuth intoxication.
• Long-term effects of bismuth compounds require further investigation.

Observation:

• A patient developed neurological and psychological symptoms resembling those of bismuth intoxication.
• These symptoms appeared after prolonged use (over 2 years) of a proprietary dyspeptic preparation containing tri-potassium dicitrate bismuthate.
• The patient's symptoms significantly improved after cessation of the medication.

Findings:

• The observed symptoms, similar to bismuth intoxication, resolved gradually over 10-12 months post-discontinuation.
• Symptom remission was sustained for at least 7 years, indicating a potentially long-lasting effect or recovery.
• This case highlights a possible link between long-term tri-potassium dicitrate bismuthate use and neurological side effects.

Implications:

• Clinicians should consider bismuth toxicity in patients presenting with unexplained neurological symptoms, especially those on long-term bismuth therapy.
• Further research into the neurotoxic mechanisms of bismuth compounds is warranted.
• This case underscores the importance of monitoring for adverse effects during extended use of gastrointestinal medications.