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Theophylline (Aminophylline)
Test CodeTHEO
Preferred Specimen
Serum, 0.5 mL minimum
Instructions
Draw at midpoint of dosing interval
Transport Container
Red top or SST
Transport Temperature
Specimen stable for 8 hours at room temp., 2 days refrigerated and longer if frozen.
Reference Range
See report for normal ranges. Critical Value: >20 ug/mL
Clinical Significance
Theophylline is a bronchodilator and respiratory stimulant that is used prophylactically to control symptoms of chronic asthma.