Nothing in this chapter shall be construed to
(1) alter an advance health care directive under AS 13.52 (Health Care Decisions Act);
(2) limit the prescribing, dispensing, or administering of an opioid overdose drug;
(3) limit an authorized health care provider or pharmacist from prescribing, dispensing, or administering an opioid for the treatment of substance abuse or opioid dependence.