Which xanthine is known to interfere with theophylline measurement due to its content?

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Enhance your knowledge with the Ciulla Clinical Chemistry Test. Study with interactive quizzes, featuring flashcards and multiple-choice questions. Each question offers hints and explanations for better understanding. Prepare effectively and excel in your exam!

Multiple Choice

Which xanthine is known to interfere with theophylline measurement due to its content?

Interference in theophylline measurements often comes from substances that are chemically very similar to theophylline and can bind to the same assay antibodies. Caffeine is a xanthine alkaloid and is structurally close to theophylline, so in immunoassays the antibody can cross-react with caffeine as well as theophylline. When caffeine is present in the sample, it can cause falsely elevated or inaccurate theophylline readings because the assay cannot perfectly distinguish between the two. The other options are not xanthines—nicotine is a pyridine alkaloid, while amphetamine and procainamide belong to different chemical classes—so they are unlikely to cross-react in theophylline assays.

Which xanthine is known to interfere with theophylline measurement due to its content?

Enhance your knowledge with the Ciulla Clinical Chemistry Test. Study with interactive quizzes, featuring flashcards and multiple-choice questions. Each question offers hints and explanations for better understanding. Prepare effectively and excel in your exam!

Which xanthine is known to interfere with theophylline measurement due to its content?

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