Monitoring theophylline therapy in patients commencing theophylline, dose changes or investigation of toxicity/non-adherence

Take sample pre-dose, or at least 3 hours post-dose

Reference ranges:

Age range Target ranges (mg/L)
< 30 days 5 - 10
Adults 10 - 20

Derived from Pathology Harmony 2011

Results outside the reference range do not necessarily indicate disease. Similarly, results within the reference range do not preclude abnormality. Please contact the Duty Biochemist for discussion of individual patient results

Other Comments:

For more information, please see the following: Theophylline - Lab Tests Online

About This Test

Department: Biochemistry


  • Gel/clotted (yellow/red top)

Add-on requests are accepted

Turnaround Time:

Within 24 hours