Anesthetics could also influence things since it's another set of chemicals in your body. You should let the staff know in advance so they can be ready in case you need any extra support. And of course, they do know about any meds you're taking, right?

I have no known drug allergies, but actually have problems with some dental anesthetics. It turns out that epinephrine is commonly added to local anesthetics and that triggers a panic attack. The epinephrine is intended to reduce bleeding, so I had some problematic oral surgery procedures because if they gave me epinephrine it would put my body into shock and then I'd black out.

But most of the time, people handle anesthetics pretty well. Just make sure that your team knows as much as possible to make sure you get the best treatment you can!