Theophylline is a medication used for long-term control of asthma or COPD, but it also requires periodic blood draws to monitor the serum level. The therapeutic level is 10 - 20 mcg/mL!
Theophylline


Theophylline is a medication used for long-term control of asthma or COPD, but it also requires periodic blood draws to monitor the serum level. The therapeutic level is 10 - 20 mcg/mL!