商品名：Many generic brands and theophylline sustained
Methylxanthine bronchodilator. Nonselective phosphodiesterase (PDE) inhibitor. Phosphodiesterase is the enzyme that converts cyclic adenosine monophosphate (cyclic AMP) to inactive forms. Therapeutic effects may be caused by cyclic AMP or antagonism of adenosine. There appears to be anti-inflammatory action and bronchodilating action. Sustained-release preparations are used to decrease frequency of administration. Oral theophylline is well-absorbed orally in dogs, cats, and horses with bioavailability exceeding 90%. After absorption, theophylline has a half-life in dogs, cats, and horses of 5-
Theophylline is administered for inflammatory airway disease in cats, dogs, and horses. Use in animals has been primarily derived from empirical use, some experimental models, and experience in humans. There are no well-controlled clinical studies or efficacy trials to document clinical effectiveness. It has been used to control clinical signs of reversible airway constriction, such as seen with feline asthma. In dogs, the uses include collapsing trachea, bronchitis, and other airway diseases. In horses, it will relieve signs of recurrent airway obstruction (heaves), but the IV dose may cause
劑量數字暫停提供：VetPro 的劑量改依 DRUGAPI 藥物資料庫對外的內容，DRUGAPI 目前不提供可直接計算的劑量。下方列出 DRUGAPI 的審查結論與劑量審查引用的來源；計算機可手動輸入劑量換算。
任何執行前必須確認活性成分究竟是茶鹼或胺茶鹼、無水或其他換算基準、完整商品與來源、錠劑或膠囊或溶液、速放或緩釋設計、強度、物種、疾病與臨床狀態、共同用藥與新發疾病、檢體採樣相對時點、使用的檢測方法、個別臨床反應及毒性警訊；不得用人用範圍或健康動物模擬取代個案契約。
依出現頻率分組；嚴重副作用獨立列出，臨床上需立即辨識。