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Theophylline Blood Test

A Theophylline Blood Test is a therapeutic drug monitoring of Theophylline.

Test Code: 007336

CPT Code: 80198

Also Known As: Aminophylline, Blood; Elixophyllin® Elixir; Theo-24®; Theo-Dur®; Theochron™; Theolair™; Uniphyl®

Methodology: Immunoassay

Specimen Type: Blood

Preparation: No special preparation required.

Test Results: 1-2 days. May take longer based on weather, holiday or lab delays.


Theophylline is used in the treatment of bronchial asthma as well as in the treatment of chronic obstructive pulmonary disease and episodes of prolonged apnea in pre-term infants. Theophylline levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.

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