The Leeds Teaching Hospitals NHS Trust

Clobazam

Clobazam

Clobazam is one of the benzodiazepines. Most commonly used as an oral antiepileptic. Indication for requesting: therapeutic drug monitoring (TDM). Clobazam has a wide therapeutic window. As tolerance can develop there is no clear relationship between plasma concentration and efficacy. Norclobazam is less potent that clobazam but retains some anti-epileptic activity.

Tube 04 (EP) - EDTA Plasma
ID Tests&Tubes0171
Additional Information No correlation between either seizure control or toxicity has yet been established, but the majority of patients receiving treatment with conventional doses of clobazam have plasma concentrations below 200 µg/L for the parent drug and 2000 µg/L for the desmethyl metabolite. Desmethylclobazam has a longer half-life and therefore reaches higher plasma concentration.
Turn Around Turnaround time stated by Cardiff: 7 days
Send to Blood Sciences LGI
(Test referred to: Cardiff toxicology lab)
Contact For further details please contact Leeds Pathology customer services: leedsth-tr.pathologycustomerservice@nhs.net.
Advice Full information on all referred tests can be found on the referred tests information database, EQMS reference BSF2REC17003.
Collection Con Instructions to lab: Centrifuge sample, separate and freeze plasma. Serum gel tubes are not suitable.
Minimum volume: 1 mL plasma
Sample REQ Blood
Ref. Range Notes 50 - 300 ug/L
Units ug/L
Telepath LCLOB / JCLOB
ICE Codes LCLOB / JCLOB