75mg Diclofenac Sodium Injection IP refers to an injection that has a pain-relieving medicine that is majorly used to treat swelling, stiffness, pain, and joint pain in conditions like rheumatoid arthritis, acute musculoskeletal injuries, osteoarthritis, and many more. It is used to treat adults with mild to moderate pain. These are likely to be taken along with other pain medicines to treat adults with moderate to severe pain.