Does The Bath Salt Has Any Adverse Effects?

i am scheduled for a medical outpatient procedure tomorrow morning, for which i will be under general anesthesia for a short while (15 minute procedure) and yesterday i ingested innocuously a so called bath salt, not realizing it had what i have googled now as MDPV in it. i have searched for any contra-indications for the anesthesia and have only found that some patients come in so crazy on that crap, that they have to be put under anesthesia. i do not want to disclose this information as this is my orthopedist, and the stigma as some kind of druggy, surely would adversely affect the medications that i receive to control the pain i almost constantly endure. what should i do? it really was unknown to me that this so called legal drug contained anything other than the vitamin b-12, and sodium bicarbinate that was on the bag. i dont want to risk continuing in constant pain, and would not have done so had i known. my friend just came by and said check this out it will give you energy. i feel so foolish now. i didn t snort it as suggested but rather ingested like a goody powder a small amount