If it's not a regular thing, I'd say go all out and take a benzo or beta blocker.

The problem with benzos and beta-blockers for recurring things is your body never really adjusts to the situation. You're just killing your response every time. And your brain - especially with amnesiac properties of traditional benzos - doesn't acclimate. So you always feel like you need to take it again.

But if it's a regularly scheduled meeting, you don't want to go down that road. You could start with something like phenibut or kratom (or some of the other suggestions). You can regulate dosage as needed, but most of the time you can still feel a little anxiety and adjust to it.

As you get more comfortable you'll need less and less, and you won't get as much of a rebound (physical or psychological) as you would with a benzo.