I take the attirude that CAA etc medicals are done to complete their requirements. I answer no to their questions as most of what they want is of questional value. What I would do if I suffered from one of the questions is go to my own GP and discuss it.
I feel that we are a mob of ginnea pigs for their experimentation. I was once told by my regulatory authority they aim to have the same failure rate on medicals as aircraft. I said that my aircraft suffers an engine failure approx every 18 months in my Co, and I (then) knew of noone that had failed to complete an aircraft flight.