Related Experiment Videos
[Unusual analytical interference caused by benzathine penicillin G]
Acta Otorrinolaringologica Espanola
|February 10, 1999
Summary
Benzathine penicillin G can cause false positive drug tests for amphetamines. This interference in urinary detection can persist for up to 50 days after antibiotic administration.
Area of Science:
- Clinical Chemistry
- Pharmacology
- Toxicology
Background:
- Benzathine penicillin G is a widely used antibiotic in ENT practice.
- Despite potential allergic reactions, its use is common due to its antibacterial spectrum against upper airway pathogens.
Observation:
- A unique analytical interference was observed in two patients treated with benzathine penicillin G.
- This interference affected the urinary detection of amphetamine and its metabolites.
Findings:
- The interference resulted in continuous false positive drug test results.
- This phenomenon was specific to benzathine penicillin G and not observed with other beta-lactams or penicillins.
- The false positive results persisted for up to 50 days post-administration.
Implications:
- This finding highlights a potential issue with specific drug testing methods (enzymoimmunoanalysis) used for drug abuse detection.
- Healthcare providers should be aware of this analytical interference when interpreting drug test results in patients receiving benzathine penicillin G.
- Further investigation into the specificity of this interference with benzathine salts and particular assay methods is warranted.