Brandy before dentists

[BulletFox]

I had to travel for a few appointments recently, last one being the dentists, which I have a severe phobia about.

20 mins before the appointment my anxiety skyrocketed and I dithered then thought 'oh sod it' and knocked back a double brandy. I felt a little bad for the dentist.

WIBU?

It went ok actually and he offered me a free appointment next time (brandy wasn't enough to calm dental nerves)

[70isaLimitNotaTarget]

Can you ask for a sedation ?
I'm an HCP (not dental) but I would possibly refuse to treat a patient who'd knocked back a double because I couldn't be 100% of their capacity to consent.