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Therapeutic use or overdose of tramadol has been associated with seizure. However, it is unknown if there are any specific predisposing factor that increases a patient’s risk of seizure after tramadol use/overdose.
In a recently published study, eighty patient data with single ingestion of tramadol were reviewed.
- 52.5% of the patient developed seizure
- 11% developed serotonin syndrome
Risk of seizure
- Higher risk of seizure were found in Asian patients (OR=7.1, 95% CI: 1.9 – 27.3) and patients with abuse/misuse of tramadol (OR=3.2, 95% CI: 1.2-8.3)
- Patients who presented with opioid toxidrome were less likely to develop seizure (OR=0.12, 95% CI: 0.02 – 0.71)
- Acute overdose and age were not associated with increased risk of seizure.
Conclusion
In this small study, Asian patients and patients with abuse/misuse were at higher risk of developing seizure compared to patients who overdose tramadol.
References
Murray, BP et al. Seizures in tramadol overdoses reported in the ToxIC registry: predisposing factors and the role of naloxone. Clin Toxicol. 2018 DOI: 10.1080/15563650.2018.1547826