The Opiates EZ Test Kit is designed to detect a broad range of opiates and related substances, including heroin, morphine, oxycodone, ecstasy-like compounds such as MDMA, MDA, MDE, and MBDB, DXM, and members of the 2C-T-xx family. Based on the Mecke reagent test, it is one of the original tests developed within the EZ Test range and is intended as a versatile option where samples may contain opioids or other substances with overlapping presentation.

The test works by producing a colour change when a small sample is added to the reagent in the ampoule. That reaction is then compared against the included colour chart to help identify the substance present. Mecke reagent is most commonly used to test for opioid alkaloids, which typically produce a blue/green colour, giving this kit a particularly strong role in identifying opiates while also reacting to a broader range of compounds.

Because it covers both opiates and several other substance groups, the Opiates EZ Test Kit is useful where broader identification is needed rather than testing for a single compound alone. Its ability to react to substances such as heroin, morphine, oxycodone, ecstasy-like compounds, DXM, and 2C-T-xx chemicals makes it a practical first-step test for samples where the contents may be uncertain.