Figure 1.

Possible urine drug test findings based on opioid prescribed.^a

^a Using confirmatory tests such as Gas Chromatography/Mass Spectrometry, Liquid Chromatography/Mass Spectrometry.

^b The pharmaceutical opioid and/or its metabolites.

^c As contained in medications such as Tylenol #3 and Tylenol #4.

^d Rarely, morphine may have codeine impurities and oxycodone may have hydrocodone impurities.

Note: the presence of 6‐monoacetylmorphine in addition to morphine metabolites in the urine is indicative of recent heroin ingestion.