xanax is not a muscle relaxer, soma would probably be more what your looking for. be careful with the xanax as its habit forming (i have been on and off of them for years). if your needing a muscle relaxer for legitimate reasons flexoril is a pretty good non narcotic substitute.
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i am not a fan of muscle relaxers at all (unless studying for five fnal exams at once) so I would say no. I never want to relax on the juice. I read FLEX all day and after i lift i flex all night comparing myself to top bodybuilders and then cry myself to sleep. (ha ha)