title: Examination of natural gums as matrices for sustained release of theophylline.
mesh_terms: D003692:Delayed-Action Preparations; D005079:Excipients; D006207:Half-Life; D011134:Polysaccharides; D013806:Theophylline / Q000008:administration & dosage*
chemical_list: D003692:Delayed-Action Preparations; D005079:Excipients; D011134:Polysaccharides; D013806:Theophylline