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Test ID FGTIA Tiagabine (Gabitril), Serum

Method Name

Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Reporting Name

Tiagabine (Gabitril), S

Specimen Type

Serum Red

Specimen Required

Draw blood in a plain red-top tube(s), serum gel tube is not acceptable. Spin down and send 3 mL of serum refrigerated in a plastic vial.

Specimen Minimum Volume

0.6 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 14 days
  Frozen  180 days
  Ambient  72 hours

Reference Values

Report Limit:                 5.0 ng/mL

Reference Range:          <235.0 ng/mL


Therapeutic and toxic ranges have not been established.


Peak concentrations are expected at 45 minutes post dose; steady state is generally attained within 2 days.


Observed tiagabine concentrations in clinical trials (30 – 56 mg/day): <1 – 234 ng/mL.


Measured tiagabine concentrations, post marketing (95% confidence interval): 0 – 440 ng/mL.


Note: The 95% confidence interval for tiagabine concentrations determined by MEDTOX Laboratories will be updated periodically as more information becomes available.


Day(s) Performed

Monday through Sunday

Report Available

2 to 6 days

Performing Laboratory

Medtox Laboratories, Inc.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FGTIA Tiagabine (Gabitril), S 21565-7


Result ID Test Result Name Result LOINC Value
Z4403 Tiagabine 21565-7

NY State Approved