Metabolism/excretion: It truly is metabolized to norhydrocodone by cytochrome P450 3A4 and to hydromorphone, also biologically Energetic, by cytochrome P450 2D6.Sure, Vicodin is an opioid. It is classified as a schedule II drug. This means it's a high potential for abuse, and may result in extreme psychological or Bodily dependence, particularly wh