Relating to the prescribing or ordering of a controlled substance or dangerous drug or device by an advanced practice registered nurse or physician assistant under a prescriptive authority agreement.

HB 3889 restricts when advanced practice registered nurses (APRNs) and physician assistants (PAs) can prescribe or order controlled substances, dangerous drugs, or devices. It requires physicians to have a specific written agreement with APRNs or PAs to delegate this authority, and the physician must already have a patient-provider relationship with the patient receiving the prescription. The bill amends Texas law to explicitly prohibit delegation for these items without such an agreement, effective September 1, 2025. This directly affects APRNs and PAs who wish to prescribe these medications under collaborative practice.