The Leeds Teaching Hospitals NHS Trust

Phenobarbitone/Primidone

Phenobarbitone/Primidone

Phenobarbitone is a metabolite of Primidone, use this test to monitor patients on primidone.
NOTE: Reporting units changed from mmol/L to mg/L May 1, 2007

Tube 01 (SE) - Serum Gel
ID Tests&Tubes0090
Additional Information For monitoring purposes, blood should not be drawn until a steady state has been attained. This will not be achieved until 2-4 weeks after starting therapy or changing dose. In children the period may be slightly shorter at 1-2 weeks. Renal or hepatic disease may result in increased phenobarbitone concentration. PLEASE NOTE: TEST CAN ONLY BE ADDED TO A SAMPLE WITHIN 8 HOURS OF COLLECTION
Turn Around A&E: N/A
Day Case: 24 Hours
In-Patient: 24 Hours
Out-Patient: N/A
GP: N/A
Send to Blood Sciences LGI
Contact For further details please contact Leeds Pathology customer services: leedsth-tr.pathologycustomerservice@nhs.net.
Collection Con Intensive care units, renal unit, transplant unit, patients on IV heparin use lithium-heparin (Green with Yellow ring) tube.
Instructions for Lab Staff: Standard lab processing- No special requirements
Sample REQ Blood
Ref. Range Notes Blood Sciences Refernce ranges available through the useful information and links page:
https://www.leedsth.nhs.uk/a-z-of-services/pathology/blood-sciences/useful-information-and-links/
Units mg/L
Telepath PENO2L
ICE Codes LPENO