Sweet Sis, someone has frightened you unnecessarily. We'll also hope Fake Boobs Rule, our resident physician who works in precisely the field of anesthesia, will chime in here later and help reassure you further.

We get this question all the time. I don't know how heavily you smoke, but from a drug-interaction standpoint, you don't likely have much to worry about. You said it's minor surgery, which I'm assuming means IV sedation with a short-acting anesthetic like propolol or thiopental. Or you may even be having local anesthesia simply to deaden a specific area of your body. Chances are not a thing in the world they give you is going to interact with cannabis, which clears amazingly quickly from the body.

If I were you, I'd be completely candid with your anesthesiologist about your smoking history and frequency. If he/she thinks it's going to be a problem, he'll make the call. If it makes you feel any better, I've never yet heard of any physician calling off anyone's surgery because the patient is a heavy pot smoker. They'd be far more likely to do that if you were a heavy cigarette smoker. (Which I hope you're not!)

The real reason it's not ideal to smoke before surgery is because it's best for people who're about to undergo general anesthesia to have lungs that are as clear and free of irritants as is possible. Smoke of any kind is an irritant. If they're going to intubate you and breathe for you during an operation, you absorb less anesthesia and use it more efficiently with clear lungs. And you get fewer post-surgical and post-anesthetic complications, too, like pneumonia.

You didn't say what sort of surgery you're having or whether you're having it done in a hospital or not. It'll help FBR, our other mod, to know that if you don't mind sharing it. Also, please reassure us that you're not into other drugs besides cannabis. If you were a heavy user/abuser of something like narcotic pain relievers, that could be a problem with your ability to wake up.

Good luck! Try not to worry, OK?