Hi, Mobizox contains both muscle relaxant ingredient like chlorzoxazone and pain reducing ingredients like Diclofenac as well paracetamol that is used in the treatment of post operative pain, osteoarthritis, rheumatoid arthritis, fibromyalgia, polymyalgia rheumatica, whiplash, dental pain and many more. This medication has some side effects. As this medication has both muscle relaxant and pain reducing properties, so it may be useful for treating fibromyalgia. As your doctor has prescribed this medication, so you should take this medication in the dose and duration as directed by the prescribing doctor. Without your doctor s advice, you should not stop taking this medication. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician