I used to have such a phobia that I had to be tranquilised just to get me in the building, never mind up the stairs, into the surgery and sitting in the chair!
Then one day, about twenty-five years ago, I had an appointment booked when my wife called and said she needed me to pick up our youngest daughter from school, which meant I had to drive, so no tranqiliser for the dentist.
You do what you have to for your children, so I went without my medication, had my treatment, and have not needed it since.