I know everyone has a different opinion. I am pre-op for back surgery in two weeks and my doctor gave me the choice between 10/325 norco 10 mgs of hydrocodone 325 acetomeniphin (tylenol) or percocet 10/325 10 mgs of oxycodone 325 of acetomeniphin (tylenol). Is there a ratio to determine which drug will produce fewer side effects, or i.e which drug is nire potent. I have taken hydromorphone (dilaudid) before and it really hit me hard (drowsy, lethargy, ect.) but was very effective as pain control, however I'd rather not be in that state for the next two weeks. Anyone know what the literature (ratios) say about the two??