Attorney General James Uthmeier is asking an administrative law judge to toss out a challenge to an emergency rule banning the sale and manufacture of a concentrated byproduct of kratom, known as 7-OH.

Uthmeier on Aug. 15 issued the rule prohibiting the alkaloid 7-hydroxymitragynine, known as 7-OH , and adding it to the list of the state's most dangerous drugs, saying the ban was needed "to avoid an imminent hazard to the public safety."

The rule went into effect immediately and will last for a year, though Uthmeier is working with the Legislature to make it permanent. The concentrated byproduct of kratom was available at smoke shops throughout the state .

Challengers argue 7-OH ban is "invalid"

Companies that sell 7-OH and users of the product filed a complaint at th

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