| Test Name: | Topiramate |
| Epic Order Code: | LAB498 |
| CPT Code: | 80201 | | |
| Specimen(s) Type: | Serum, 1.0 mL |
| Acceptable Container(s): |  Tube top is red. |
| Testing Schedule: | Monday-Friday, 7:30 a.m. to 4 p.m.. After-hours, emergency basis only. |
| Turn Around Time: | STAT: 30 minutes |
| | Routine: 2 hours |
| Collection Information: | Collect 0.5 - 1.0 hours before dose (trough) or 2 - 4 hours after dose (peak). Obtain specimen by standard collection procedures. Do not collect in serum separator tubes. |
| Transport Information: | Deliver to lab immediately. All specimens must be signed into the laboratory. |
| Reference Clients: | If unable to deliver to the lab within 1 hour, centrifuge the specimen and remove serum from the cells. Store and transport at -20° C within 7 days. |
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect transport. |
| Reference Range: | Trough: 2 - 20 µg/mL |
| | Potentially Toxic: > 20 µg/mL |
| Additional Information: | Some individuals may tolerate higher concentrations. Interpretation of results should include clinical evaluation. |