So today is Friday (where I am, as I type), and you have surgery Monday.
Well, depending on how much you partake, and depending on what the surgery is for, and a bunch of other unknowns, who knows?
I mean, if you're surgery is open-heart or to clamp an aneurysm, I'd say absolutely do not partake.
If you're getting wisdom teeth pulled and you're not brave enough to stick to just novocaine and need nitrous, I'd say you're probably fine. But I'm no anesthesiologist, those fuckers get paid. To put a mask on your face and ask you to count backward, then sit there.
Anyway, we both know you're going to partake. Just try not to go nuts, OK?