Pre-surgery consultation has always included discussions about other conditions and a detailed
list of all
medications, vitamins, supplements, herbs, etc. that the person takes. The anesthesia choice is an important one, and is made by considering many factors including health conditions and medications, etc.
Read up on the underlying condition and the recommended surgery at reputable sites such as this one:
http://www.nei.nih.gov/neitrials/viewStudyWeb.aspx?