A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Topiramate
Test Code30965
Alias/See Also
LAB498
TOPR
TOPR
CPT Codes
80201
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Patient Preparation
Draw at peak (2-4 hours after dose) or trough (0.5-1 hour before dose) at steady state
Minimum Volume
0.5 mL
Other Acceptable Specimens
Plasma collected in: Sodium heparin lead-free (tan-top) tube, sodium heparin (green-top) tube, or lithium heparin (green-top) tube
Transport Container
Transport tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gel barrier/Serum Separator Tube (SST®)
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
10: 00 a. M. Tues-sat
Report Available
2-4 days
Reference Range
Therapeutic Range
Dose (mg) | Peak (mcg/mL) | Trough (mcg/mL) |
100 | 6.5-9.2 | 4.5-6.6 |
200 | 12.0-16.0 | 8.0-12.0 |
400 | 20.0-30.0 | 14.0-20.0 |
Clinical Significance
Topiramate is an anticonvulsant used as an adjunctive treatment of partial-onset epilepsy. Therapeutic drug monitoring is useful to optimize dose and avoid toxicity.
Performing Laboratory
Quest Diagnostics Nichols Institute |
27027 Tourney Road |
Valencia, CA 91355-5386 |