I don't see any reason too, but thats just my opinion, however I would suggest a using GH to speed recovery..start two weeks before and continue for 6 weeks..it will help the healing process
You can tell the doctor your on. He will not cause any ordeal or disclose the infomation. If what your on decreases coagulation it may be beneficial to fill him in. Been there and the gear never caused any issues.
in that case i dont see it being that big of a problem im supposed to have a scope done in about 5 weeks on my left knee. Im not on anything as of now though and wont till i heal but if your already on something i wouldnt really see a big problem with it.