(c) A physician may not be subject to disciplinary action by the board for prescribing, dispensing, or administering an investigational drug, biological product, or device, or providing related treatment, to a patient for the purpose of sustaining the patient's life if the patient
- (1) has a terminal illness;
- (2) is ineligible or unable to participate in a current clinical trial for the investigational drug, biological product, or device;
- (3) has considered, after consultation with the physician, all other treatment options currently approved by the United States Food and Drug Administration; and
- (4) has given informed consent in writing for the use of the investigational drug, biological product, or device.