Theophylline (Serum, Kims)

What is the Theophylline Serum test?

The Theophylline Serum test measures the concentration of theophylline, a bronchodilator used to treat asthma, chronic obstructive pulmonary disease (COPD), and other respiratory conditions. Therapeutic drug monitoring ensures that the drug stays within a safe and effective range.


Who should get this test?

This test is recommended for:

Patients on theophylline therapy to monitor drug levels.
Individuals experiencing side effects or suspected toxicity.
Those whose symptoms are not responding to treatment.



How is the test performed?

A blood sample is collected and analyzed to determine the concentration of theophylline.


What do the results indicate?


Therapeutic range (10–20 µg/mL): Optimal drug concentration for effectiveness.
Low levels: May indicate inadequate dosage, leading to ineffective symptom control.
High levels: Suggest toxicity, which can cause side effects such as nausea, arrhythmias, and seizures.



Why is therapeutic monitoring important?

Regular monitoring ensures theophylline remains within the therapeutic range, minimizing the risk of toxicity while maintaining symptom control.