I have never had any hint of a high from Vicodin, or from the Vicodin-like medicines (also acetominophen/paracetomol* with codeine, and in similar doses to those in VIcodin, I think) that you can buy over the counter in Britain. On occasion I have taken it when I have only been experiencing only quite mild pain or discomfort. (I occasionally take one when my bowels are inconveniently loose, to calm them down, but that is hardly pain.) I still do not get any buzz from it.
On the other hand, the one time I was given Percoset (or possibly Demerol), when I had a colonoscopy, I did feel extremely mellow afterwards. But those are much stronger drugs than Vicodin.
It is worth noting, however, that it is very dangerous to take large doses of Vicodin, not so much because you will get addicted to the codeine, the narcotic component, but because even quite moderately large doses of acetominophen/paracetomol can cause severe and irreversible liver damage, and even death. If people are taking multiple Vicodins to get high, they are probably killing themselves. They would be much safer taking equivalent amounts of pure codeine, which is the component entirely responsible for the high (if there is one) and the putative addictiveness anyway.
I am pretty sure Dr House ought to have been dead long ago. As he and his colleagues should surely know, he ought not to be on Vicodin, but on pure codeine (or some other narcotic painkiller), which would be both much safer and more fun for him…
Mind you, I was once on regular, relatively high doses of codeine (I was taking it for chronic irritable bowel, and I am pretty sure that the dose was considerably higher than were higher than what you would get from a safe dose of Vicodin), and never got a buzz from that either. I was taking it for something like two years, and I may have become mildly addicted, but, when the time seemed appropriate, I was able to wean myself off it quite easily, and, with the irritable bowel now cleared up, I did not miss it at all.
I am not claiming that I do not have an "addictive personality - I may well have (I think I am addicted to The Dope!) - but I am saying that codeine, in the small amounts that are found in Vicodin, or even in the larger amounts that were once prescribed for me, never got me in the least high, nor did it get me seriously addicted.
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*Acetominophen and paracetomol are the different names that are, for some unfathomable reason, used for the generic form of the exact same drug in America and Britain respectively. (Americans often call it Tylenol or Motrin too, but those are brand names.) The British name is better however, because it is also the answer to the question “Why are there no aspirins in the jungle?”