1 Red Top/1.0 mL serum. Do not collect in SST tube. After 30 minutes of clotting, promptly centrifuge and refrigerate. Draw just before next dose.
Room Temperature 24 hours, Refrigerated 14 days, Frozen 14 days
1-3 days Performed Mon-Fri
Antiepileptic therapeutic drug monitoring. Peak plasma levels are reached in about 2 hours after oral administration. Elimination half-life is 10-100 hours.