Are medication cocktails standard or do the vary among surgeons?

Lorazapam, Hydrocodone, Keflex and Clonadin are the medications that have been prescribd for me for the day of surgery. I will be having a combination of smart lipo, lipotherme and vaser lipo on my upper arms, back bra fat, chin and neck on July 10th. Is this a good cocktail and is it possible that I could actually fall asleep during the procedure? I've been told to eat one hour prior to surgery to prevent nausea. What are your thoughts on this? Thanks

No doctor answers yet