Misleading tricyclic antidepressant findings in cases of diphenhydramine overdose: analysis of two instances and a review of existing literature - Summary - MDSpire
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Misleading tricyclic antidepressant findings in cases of diphenhydramine overdose: analysis of two instances and a review of existing literature
To analyze two cases of diphenhydramine (DPH) overdose that resulted in false-positive tricyclic antidepressant (TCA) results and discuss the clinical implications for diagnosis and treatment.
Key Findings:
Both cases showed false-positive TCA results on urine drug screening due to DPH overdose, highlighting the need for careful interpretation of UDS.
DPH is frequently overdosed, particularly among adolescents in Japan, necessitating increased monitoring.
Urine drug screening kits currently used in Japan do not test for DPH, which can lead to misdiagnosis.
Interpretation:
The findings highlight the potential for misdiagnosis in cases of DPH overdose due to false-positive TCA results, emphasizing the need for increased awareness and training among healthcare providers regarding the limitations of current urine drug screening methods.
Limitations:
The study is based on only two case reports, limiting generalizability and the ability to draw broader conclusions.
Lack of comprehensive data on the prevalence of false-positive results from DPH overdose, which may affect the understanding of this issue.
Conclusion:
Healthcare providers should be cautious when interpreting urine drug screening results in cases of suspected DPH overdose, as false positives for TCAs can occur. Implementing additional screening methods or protocols may help mitigate misdiagnosis.
