Feedback

Test Code: Theo Preferred Name Theophylline

No
N/A
Test performed on weekdays
2 days
Medicare Item
N/A

Test Tubes

ImageSpecimen TypeSpecimen VolumeTube Type
Blood (adult)3 mLSST 5 mL (Biochem) with GEL (Dark Yellow Top)
Blood (paediatric)500 uLSST with gel 600 uL Paed (Red or Yellow top)
Blood (neonatal)500 µLSST with gel 600 uL Paed (Red or Yellow top)

COLLECTION NOTES

Please note the dosage and dose time on the request slip to allow interpretation of results.

GENERAL NOTES



APPLICATION:  Monitoring theophyline therapy in asthmatics.

INTERPRETATION:  During acute illness, the half-life may be prolonged beyond the usual range of 3-9 hours; toxicity may develop if the dosage is not reduced. Toxicity may occur within the therapeutic interval in some patients.  Cigarette smoking reduces the half-life and therefore decreases levels significantly.  The apparent half-life is also prolonged when slow-release preparations are taken.
Anti-asthmatic drug.  For advice on collection times, contact the Therapeutic Advisory Service (beep 0282).

Back to top