False Positive Tramadol Urine Testing in Patients Taking Fexofenadine: A Tale of Two Consecutive Cases

Urine drug screen immunoassays have been widely used as point-of-care testing for detection of various drug classes in substance use disorders. However, these immunoassays frequently result in false positive results. We report two patients that used 180 mg daily dose of fexofenadine hydrochloride fo...

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Detalles Bibliográficos
Autores principales: Yousuf, Suhair Mohammed, Alater, Ahmad Maaen, Alabdulla, Majid, Osman, Mugtaba
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2023
Materias:
Case Report
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9836806/
https://www.ncbi.nlm.nih.gov/pubmed/36643013
http://dx.doi.org/10.1155/2023/4370648
Descripción
Sumario:Urine drug screen immunoassays have been widely used as point-of-care testing for detection of various drug classes in substance use disorders. However, these immunoassays frequently result in false positive results. We report two patients that used 180 mg daily dose of fexofenadine hydrochloride for treatment of skin allergy and, falsely, tested positive for use of tramadol during urine drug screening. We recommend caution when interpreting positive tramadol urine screening among patients on fexofenadine treatment.

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