For wisdom teeth extraction, its likely you will not actually be under a general anesthetic, as its not necessary, and is much safer to just be heavily sedated on something such as Midazolam, which is a benzo that sedated and produces an amnesiac effect so the Pt. Doesn't remember the surgery. This enables the patient to follow basic commands during the surgery, and eliminates the need for intubation.
LSD is likely to increase the dose required to achieve the desired level of sedation, and if this happens, it might not be very pleasant at all for you.
Should you decide you just have to have a trip, ensure you are honest with the dentist/anesthesiologist from the start. They will know for certain if its nothing to worry about, or if you should reschedule...