Is Vicodin and Heroin both in the same category if tested?

Both Heroin and Vicodin (hydrocodone) metabolize into very similar proportions of the chemicals that are actually tested for in drug tests. The chemical assay that is performed in quick test kits does not actually test the sample for the drug, nor do the more advanced methods laboratories may use. Instead, these methods all test for the metabolite of the drug, which is what your body metabolizes the drug into for elimination from your system via urine or other route. Advanced lab tests can determine the exact amount and ratio of what metabolites are present in your urine. The ratio of metabolites from hydrocodone and Heroin are so close that most people performing the tests either cannot tell the difference, or will chalk it up to acceptable differences in the range of results and ignore it. I used this knowledge to fool my parole officer into believing that I was not using heroin because I had a doctors prescription for Vicodin. This worked well for me for years.