Metabolites are defined as the products of metabolism. When drugs are ingested and metabolized by the body, the remaining residues (metabolites) of the drugs may remain in the body for days or even weeks, long after any effects of the drugs have disappeared. In other words, chemical testing of blood or urine may reveal evidence of drug use long before any encounter with law enforcement. Despite the fact that you no longer have any active drug chemical compounds or ingredients in your bloodstream and that metabolite residues do not impair your abilities in any way, the mere existence of any measurable metabolites will result in a charge of DUI. Convictions under this code do not require proof of impaired driving, positive metabolite tests results are all that the prosecution is required to prove to convict the unfortunate driver of a Metabolite DUI.
The charge is itself an oxymoron, a charge for being under the influence when in fact the metabolites have no influence on mood, perceptions or motor skills. As drug laws are liberalizing around Utah, this law will eventually be stricken, but for the time being it remains the law.