Interpretation of Results

Normal Therapeutic Range:
- 4 – 12 mcg/mL (17 – 51 µmol/L)
Toxic Levels:
- Above 12 mcg/mL may indicate toxicity.
- Severe toxicity symptoms typically appear above 15 mcg/mL.
Subtherapeutic Levels:
- Below 4 mcg/mL may indicate insufficient dosage.
Other Considerations:
- Autoinduction: Carbamazepine induces its own metabolism, meaning levels may drop after a few weeks, requiring dose adjustments.
- Free vs. Total Drug: Some patients (e.g., those with low protein levels) may need free carbamazepine testing instead of total levels.