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Unsuspected Caffeine Toxicity Complicating Theophylline TherapyDepartment of Chemical Pathology, University College Hospital
Department of Chemical Pathology, University College Hospital
Academic Department of Child Health, Queen Elizabeth Hospital for Children, Hackney Road, Bethnal Green, London
Academic Department of Child Health, Queen Elizabeth Hospital for Children, Hackney Road, Bethnal Green, London
Department of Medicine and Clinical Pharmacology, University College Hospital, Gower Street, London, UK
Department of Medicine and Clinical Pharmacology, University College Hospital, Gower Street, London, UK 1 A 58-year-old man with a history of alcoholic liver disease and chronic airflow obstruction presented with heart failure and acute bronchitis. 2 Plasma methylxanthines were estimated as a guide to further theophylline therapy and serious caffeine accumulation was noted in the presence of a subtherapeutic concentration of theophylline. 3 After 3 weeks on a caffeine-free diet theophylline and caffeine challenge tests were performed which demonstrated the ease with which caffeine could accumulate. 4 The importance of caffeine accumulation during theophylline therapy is discussed.
Human & Experimental Toxicology, Vol. 3, No. 6,
509-512 (1984) |
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