Interpretation of Pain Management Testing Results Using Case Examples
2018
Background: Because of the increasing volume of opiate-related overdoses, clinical testing of urine for drugs and related compounds in pain management clinics has become increasingly important. Interpreting findings of drugs present in urine specimens requires knowledge of pharmacokinetics, metabolism, drug purity, and cutoff concentrations used to report a positive result. Content: This case-based mini-review provides examples of how to interpret immunoassay and quantitative confirmatory urine drug-testing results. Particular emphasis is placed on interpretation of opiate and benzodiazepine results, as these drugs have complicated metabolic profiles. Summary: Both determining patient medication compliance and identifying the presence of additional drugs provides important information to the treating physician involved in managing pain. Mass spectrometry-based methods are required to identify specific drugs present and can provide important quantitative data for interpreting opiate medication compliance.
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