<s>[INST] I had pain in my lower back on the left side so i went to the doctor and she gave me EC-naprosyn and tizanidine for pain because she thought it was my muschel by where it hurt when i moved but I have also been unable to use the bathroom so i drank Magnesium citrate from walgreens so i could go but i am still unable to go and still have pain [/INST] HiThank you for asking HCM. I have gone through your query. If you have dysuria and back pain then you should out an urinary infection which is most likely. If that is clear and you have signs and symptoms of muscle strain or sprain then you can take tizanidine which is a muscle relaxant and naproxen a NSAID for short duration. Hope this may help you. Let me know if you have any further queries. </s>