At a Glance
Why Get Tested?
To measure the amount of theophylline or caffeine in the blood, to establish an appropriate dose and to maintain an appropriate level
When to Get Tested?
At the start of drug therapy and at regular intervals to monitor the drug’s levels; when indicated, to detect low or possible toxic concentrations
A blood sample taken from a vein in your arm or from pricking an infant’s heel
Test Preparation Needed?
No specific test preparation is needed.