Hi there Eva, and welcome to NeuroTalk.

Usually it is OK to take pain medications prior to sugery IF you would normally take them at that time, but it's imperative that the Anethetist knows the name of the medication, the dose and the time that you want to take the pain killers....prior to actually taking them.

He may have to alter the amount of the anesthetic that he gives you depending on the dose and name of the medication that you want to take.

You wouldn't want to be over sedated and unable to wake up after the operation, or even under sedated because your body might need more of the anesthetic agent, and maybe wake up before the procedure was finished.

Both those extremes would be highly unlikely, but it's the anethetist rather than the surgeon that you need to get in contact with, and if you don't know the name of the one who'll be doing your operation, then the surgeon (if it's a private hospital) or the hospital operation booking department (for the public scheme) will have those details.

Good luck with your surgery, and welcome again to the site.