PHARMACY: This bill amends the Pharmacy Practice Act to enable prescriber-authorized substitution for drug products that are in the same therapeutic class and are expected to have a substantially equivalent therapeutic effect, provided certain conditions are met. Specifically, both the prescriber and patient must opt-in to the drug product substitution, and the substitution must intend to lower the cost to the patient. In addition, the pharmacist must notify the original prescriber when a substitution occurs.