Niflumic acid is primarily used as a nonsteroidal anti-inflammatory drug (NSAID) to alleviate pain and reduce inflammation in conditions such as arthritis, musculoskeletal disorders, and post-operative discomfort. It works by inhibiting cyclooxygenase enzymes, which are involved in the production of prostaglandins that cause inflammation and pain. Additionally, it has been studied for its potential role in treating certain types of cancer due to its ability to modulate ion channels and cellular signaling pathways. In research, it is also utilized as a tool to investigate calcium-activated chloride channels in various physiological studies. However, its use should be under medical supervision due to potential side effects such as gastrointestinal issues or allergic reactions.