Sustained-release theophylline preparations.
D000042:Absorption; D001249:Asthma / Q000188:drug therapy; D001991:Bronchitis / Q000188:drug therapy; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D003692:Delayed-Action Preparations; D006801:Humans; D013806:Theophylline / Q000008:administration & dosage* / Q000378:metabolism
D003692:Delayed-Action Preparations; D013806:Theophylline