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Current Cutoff Levels for Toxicology
1. Oxycodone metabolizes to oxymorphone.2. Hydrocodone can be a pharmaceutical impurity of the Oxycodone production process. It may be present in very small amounts with high levels of Oxycodone (less than 4% of the oxycodone level).3. Oxycodone and Hydromorphone can be pharmaceutical impurities of the Oxymorphone production process. If either are present at levels less than or equal to 0.5% of the Oxymorphone level, it is likely an impurity and not evidence of use of Oxycodone and/or Hydromorphone.