Safenac is used for the relief of pain and inflammatory in various conditions Intramuscular injections of safenac are used in :Musculoskeletal and joint disorders such as : rheumatoid arthritis , osteoarthritis , ankylosing spondylitis lumbago , sprains and strains . Painful conditions such as: renal colic , biliary colic , acute goat , severe migraine attacks , and dysmenorrhea. Intravenous infusions of safenac are used to treat or prevent post-operative pain .