Karen,
Good luck to you no matter which direction you go! Crohn's 4 ever is correct that some doctors not "easily ready" prescribing LDN. I had to persuade my GI to let me give it a try and I am so glad that he did. I am also happy that he is willing to monitor me on it.
My only suggestion is that you do some research on it (if you are interested). The lowdosenaltrexone website has a lot of information.
I have not heard that that the "benefits" wear off in time like with other treatments. I have been in direct contact with several people that have used LDN for years with great success. Of course, what works for one may not work the same for others.
But, like I said, you need to do what is best for you!!!!!!
Take care and please keep us posted on how you are doing!