Professional ethics
Doctors v Patients

"Despite what you may believe, there is more to the doctor-patient relationship than merely satisfying a patient's wishes. There is also a requirement to exercise professional judgment and uphold professional standards in a way that reflects the patient's best interests. If the patient's demands are contrary to appropriate standards or are against their best interests, those demands should be refused. That might seem unreasonable, but that is the difference between a professional relationship and a less constrained merchant relationship. The patient isn't allowed to make the doctor do whatever he wants, in the name of autonomy, or for any other reason."
Anon.