please be very careful and take this medication only as directed by your doc and the half life tends to change from one person to the next and also changes the longer you take it. I have seen it do wonders for pain in my hospice patients but also have seen it do nasty things to ppl who think of it as a "recreational drug". Some of the docs I work with will not even try to use it unless the patient is hospitallized while it is titrated.
just a fyi from an old nurse