In Utah, driving under the influence of a controlled substance that impairs your ability to drive safely is:
Legal if the substance was prescribed to you.
Prescription does not exempt impaired driving.
A DUI, with penalties equivalent to alcohol DUI.
Only an issue for cannabis, not other drugs.
All impairing substances are covered.
A minor infraction.
Drug-impaired DUI is a serious charge.
Utah's DUI statute (Utah Code §41-6a-502) covers alcohol AND any drug that impairs safe driving — including prescription medications, over-the-counter drugs, and illegal substances. Prescription alone is not a defense if the driver was impaired. Penalties match standard DUI: license suspension, fines, education program, and possible jail.
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