My husband recently went on re-diagnosing (re establishing pretty much life long diagnosis for medication review) because his GP wanted him to try different meds and he had to see a psychiatrist (he didn’t see one for ages, he sees a therapist and GP renews his long standing prescriptions”.

He had two interviews, had to do questionnaire, they made me do one too, then when he went in person to see a neurologist because psychiatrist wanted to make sure, they filmed him during interview at neurologist. And at the end they said “yep you have XYZ”. He was like “lol Duh of of course I do.”

The whole thing was very lengthy. But he was switching meds because both him, his GP and therapist felt it kind of stopped working but he cannot increase the dose due to his job. So maybe that’s why they wanted to be thorough.

I’d say lots could be determined after talking to someone for two hours but some things could look like something else too. And some stuff is hard to diagnose