Hi, Mobizox contains acetaminophen, chlorzoxazone and diclofenac which is pain reliever and muscle relaxer and is used to treat muscle spasm, swelling, arthritis, minor surgeries, dislocations and fractures. Mobizox inhibits the systhesis of postsglandins and block the nerve impulses that are sent to the brain thereby minimizing the discomfort caused to due to pain. It works by increasing the blood circulation across the skin, relieving the inflammation and maintaining the body temperature thereby increasing the pain threshold. Unless you are allergic to acetaminophen, chlorzoxazone or diclofenac, Mobizox is a safe medicine to use. However, people with liver or kidney related disorder and ladies during their pregnancy or lactation period should avoid the drug. 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