Is Sublinox Meant To Intake On A Short Treatment Period.

Is sublinox meant to intake on a short treatment period. I have been diagnosed with mild cognitive disorder , developed insomnia, prescribed clonazepam, but my sleep patterns were becoming shorter and shorter. The sublinox was then prescribed and I have been on it for about 8 months now. Should I worry about that extended time I am taking it. YYYY@YYYY