I tried the stuff for neuropathic pain following several surgeries, I've been deeply addicted to benzos in the past and had problems with alcohol and other substances so was a little concerned.
Maybe I was fortunate as I really didnt get on with it at all it made me feel quite ill effecting my cognition and vision so I ceased and didnt feel in anyway compelled to take any more, however having been there with Benzos and drink I can relate to this type of habit and the issues with getting off such substances.
You dont mention why you are prescribed them ? I moved onto Amiltriptyline for a while, it's hard to say how effective it was but it was at least non habit forming.
As I understand it long term use needs to be dealt with in much the same way as alcohol of Benzos, tapering or a switch (under medical supervision) to an alternative substance and then a taper, the length and format of the taper depends on the length of time you have been using and at what level. I would advise at the very least making your own structured taper schedule, have a read through some of
Dr Heather Ashton's Work, the schedules for Benzo withdrawal will give you some idea of the type of schedule required.
Ideally you will take this up with your doctor but I know that that isnt always easy. The good news is that using the taper method it is possible to beat even the biggest Gaba drug habit with the minimum of discomfort and more importantly avoiding the life threatening risks associated with suddenly ceasing use from long term use.