.png | width = 167 = | image2 = Theophilline.png | CAS_number = 58-55-9 | ATC_prefix = R03 | ATC_suffix = DA04 | ATC_supplemental = | PubChem = 2153 | DrugBank = APRD00082 | chemical_formula = C7H8N4O2 | molecular_weight = 180.164 g/mol | bioavailability = | protein_bound = 40%, primarily to albumin. | metabolism = Via P450 enzymes | elimination_half-life = 8 hours | pregnancy_category = Australia: A, USA: C | legal_status = P *, available without prescription | routes_of_administration = }} Theophylline is a methylxanthine drug used in therapy for respiratory diseases such as COPD or asthma under a variety of brand names. As a member of the xanthine family, it bears structural and pharmacological similarity to caffeine. It is naturally found in black tea and green tea.
The main actions of theophylline are:

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Theophylline: Questions and Answers - Fact sheet from National Jewish Medical and Research Center (USA) discusses dosage, the different preparations that contain this medication, and patient monitoring.
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