Representative Cutler introduced HB 173, Controlled Substances Act Amendments, saying the bill would add two substances to the schedule of controlled substances after encountering cases of harm. Cutler told the House a constituent’s young adult son was hospitalized after using phenibut purchased online, and committee work identified two substances — named in the sponsor’s presentation as "Tienaption" (described as sometimes called "gas station heroin") and "sphenobut" — that have been sold as supplements or observed in some products.

Cutler said he and committee members consulted doctors and could not find medical use for the two substances, and therefore proposed adding them to Schedule I. He told members the change would make clear to retailers that the substances should not be made available in Utah. Voting was opened and HB 173 passed the House 74 yes, 0 no and was sent to the Senate for consideration.

The transcript records sponsor testimony identifying specific products and clinical concerns; it did not record detailed scientific citations on the floor.