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Drug interference with laboratory value interpretation: A review

J L Hansen, F N Schneiweiss

The American Journal of Medical Technology

|March 1, 1981

Summary

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Medications can impact laboratory test results through physiological side effects or direct analytical interference, potentially obscuring diagnoses and hindering patient monitoring. Understanding these drug effects is crucial for accurate medical interpretation.

Area of Science:

Clinical chemistry
Pharmacology
Laboratory medicine

Background:

Medications are essential for treating illnesses.
Drug administration can lead to unintended physiological changes.
Laboratory testing is critical for diagnosis and monitoring.

Purpose of the Study:

To highlight how medications can affect laboratory test results.
To explain the mechanisms of drug interference in laboratory determinations.
To emphasize the importance of considering drug effects in clinical practice.

Main Methods:

Review of known drug-induced effects on physiological systems.
Analysis of direct analytical interference by drugs and metabolites.
Compilation of affected organ systems (hepatic, renal, hematologic, etc.).

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Main Results:

Drugs can cause physiologic abnormalities affecting diagnosis and monitoring.
Drug metabolites can directly interfere with laboratory assays.
Falsely elevated or decreased laboratory values can result from drug interference.

Conclusions:

Drug-induced effects pose a significant challenge in laboratory medicine.
Awareness of potential drug interferences is vital for accurate patient assessment.
Clinical interpretation of laboratory data must account for medication use.