Another future MENSA member come out from hiding..
1) Even the weakest hydrocodone pill (2.5mg) is about as strong as a Tylenol #3, technically it's a little weaker but it's not like one of either is going to do much to you..
2) Do they have the same effects? Generally yes, both are narcotics, both work by binding to opioid receptors...
3) Neutralize the codeine? If you want to do that just toss out the Tylenol WITH codeine and pick up a bottle of Tylenol from your local grocery store ... if you wanted to trade on an mg-for-mg basis I am sure that someone in this group would be willing to trade, maybe even on a 2-for-1 basis!
I'm sure your english is a lot better then my... whatever you speak!