Partial filling of prescriptions

(a) The partial filling of a prescription is permissible for any prescription if the pharmacist is unable to supply, or the patient requests less than the full quantity called for in a written, electronic, or oral prescription, provided the pharmacist makes a notation of the quantity supplied on either the written prescription or in the electronic record. (b) The partial filling of a prescription for a controlled substance listed in Schedule II is permissible if the pharmacist is unable to supply or the patient requests less than the full quantity called for in the prescription. The remaining portion of the prescription may be filled within seventy-two hours of the first partial filling: Provided, That if the remaining portion is not or cannot be filled within the seventy-two hour period, the pharmacist shall notify the prescribing individual practitioner. Further quantity may not be supplied beyond seventy-two hours without a new prescription.