Doil 15mg Liniment belongs to a group of medicines called nonsteroidal anti-inflammatory drugs (NSAIDs). It is used for short-term relief of pain, inflammation, and swelling in conditions that affect joints and muscles. It works by blocking chemical messengers in the brain that tell us we have pain. It can help relieve pain in conditions like rheumatoid arthritis and osteoarthritis. Take it as it is prescribed to get the most benefit. Do not take more or longer than needed as that can be dangerous. In general, you should take the lowest dose that works, for the shortest possible time.