Amazing..Dr. Mcguire is a miracle worker. I have severe PTSD, and a high tolerance to any medicine like injtions to numb or any pain killer. It takes usually 8-12 injections, of which each only last about 20 min long. I was sent to Dr Mcguire for a difficult root canal under a temp bridge, I had no pain , and very little memory of the whole procedure. Im a difficult paitent to say the least, but