Thanks for the query,
You need a re-evaluation by a neurologist
. Increased urination could be due to urinary infection and/or new problem in the spinal cord
which happens in patients with MS. Regarding the low tone in the legs, this could be related to Tizanidine
. Some patients with this medication also complain of poor sleep. But you may be having a poor sleep due to frequent urination
also. You may stop taking the tizanidine tab for about a week and if the symptoms do not improve, you may consult another local neurologist who will evaluate you in detail.
Hope this helps