title: Endoscopic removal of a pharmacobezoar of slow release theophylline.
mesh_terms: D001630:Bezoars / Q000209:etiology* / Q000628:therapy; D003692:Delayed-Action Preparations; D006801:Humans; D013806:Theophylline / Q000008:administration & dosage*
chemical_list: D003692:Delayed-Action Preparations; D013806:Theophylline