Association between tramadol use and seizures: A nationwide case-case-time-control study

Area of Science:

• Pharmacovigilance
• Neurology
• Epidemiology

Background:

• Tramadol is an analgesic that may potentially lower the seizure threshold.
• Previous evidence linking tramadol to seizures is inconclusive.
• Understanding this association is crucial for patient safety.

Purpose of the Study:

• To investigate the association between tramadol use and the occurrence of seizures.
• To determine if tramadol use increases seizure risk in a real-world clinical setting.

Main Methods:

• A case-case-time-control (CCTC) study was conducted using South Korean healthcare data (2003-2015).
• 2523 incident seizure cases were matched with future cases.
• Tramadol exposure was assessed during risk and reference periods; adjusted odds ratios (aOR) were calculated.

Main Results:

• The adjusted odds ratio (aOR) for seizure with tramadol use was 0.94 (95% CI, 0.98-1.43).
• Dose-response analysis showed no significant trend, with low-dose aOR of 0.80 (0.50-1.28) and high-dose aOR of 0.92 (0.41-2.11).

Conclusions:

• No significant association was found between transient tramadol use and seizure incidence.
• The findings suggest tramadol does not substantially increase seizure risk in clinical practice.