| Synonyms | Topamax |
| SPECIMEN REQUIREMENTS | |
| Container Type | Red top tube (plain) |
| Supply Item Number | 1372 |
| Specimen Type | Serum |
| Preferred Volume | 1 mL |
| Emergency Minimum Volume | 0.3 mL |
| Patient Prep | Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration. |
| Specimen Processing | Separate serum or plasma from cells ASAP or within 2 hours of collection and transfer to a standard PAML aliquot tube. |
| Store and Transport | Refrigerated |
| Stability | Room Temp 6 days Refrigerated 1 week Frozen (-20 °C) 1 month |
| Unacceptable Condition | GEL SEPARATOR TUBES; grossly hemolyzed specimens |
| Alternate Specimens | Lavender (EDTA), pink (K2EDTA) or green (sodium or lithium heparin) |
| Limitations | If testing is to be delayed by more than 1 week, specimens should be stored frozen for up to 1 month prior to being tested. Avoid repeated freezing and thawing of the specimen. |
| Reference Laboratory | PAML |
| CPT Codes | 80201 |
| Interface Order Code | 80201.Z3 |
| Billing Code | TOPARP |
| Test Schedule | Mon-Fri |
| Turnaround Time | 1-2 days |
| Method | Enzyme Immunoassay |
| Reference Ranges | | Title | Descriptor | Ranges | Units | | Topiramate | Therapeutic Range | 2.0-25.0 | ug/mL | | Toxic | Not well established |
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| Clinical Significance | Topiramate is a broad spectrum, anti-epileptic drug used to control various types of seizures. |
