Celecoxib 100mg is a nonsteroidal anti-inflammatory drug (NSAID) used to treat mild to moderate pain and help relieve symptoms of arthritis, such as inflammation, swelling, stiffness, and joint pain caused by osteoarthritis, rheumatoid arthritis, or juvenile rheumatoid arthritis. It is also used to treat ankylosing spondylitis, which is a type of arthritis that affects the joints in the spine. Celecoxib is also used to treat acute pain and menstrual cramps. Additionally, it is used to treat acute migraine headaches with or without aura. Celecoxib works by blocking the bodys production of certain natural substances that cause inflammation, which helps to decrease swelling, pain, or fever. Celecoxib is available only with a doctors prescription and comes in different dosage forms, including capsules and oral solution. It is important to read the medication guide provided by the pharmacist before starting to use celecoxib and each time you get a refill. If you have any questions, ask your doctor or pharmacist.