A pharmacist may not compound or dispense any prescription order when he or she has knowledge that the prescription was issued by a practitioner without establishing a valid practitioner-patient relationship. An online or telephonic evaluation by questionnaire, or an online or telephonic consultation, is inadequate to establish a valid practitioner-patient relationship: Provided, That this prohibition does not apply:
(1) In a documented emergency;
(2) In an on-call or cross-coverage situation;
(3) For the treatment of sexually transmitted diseases by expedited partner therapy as set forth in article four-f, chapter sixteen of this code; or
(4) Where patient care is rendered in consultation with another practitioner who has an ongoing relationship with the patient and who has agreed to supervise the patient's treatment, including the use of any prescribed medications.