I would definitely fire her immediately. As Akbeth said, you will find it difficult to be able to provide this patient unbiased health care. Doctors are humans and we are not immune to harboring ill-feelings toward patients. I would send the certified letter stating that you feel your doctor/patient relationship has been compromised and that it would be in her best interest to find another doctor with whom she feels more comfortable. I would give her 30 days of Lortab and end it there.