Celebrex is a nonsteroidal anti-inflammatory drug (NSAID). It works by reducing hormones that cause inflammation and pain in the body. Celebrex is used to treat pain or inflammation caused by many conditions such as arthritis, ankylosing spondylitis, and menstrual pain. This article describes the dosages of Celebrex, as well as its strengths and how to take it. To learn more about this drug, see this Celebrex overview. Celecoxib is a nonsteroidal anti-inflammatory drug (NSAID) used to treat mild to moderate pain and help relieve symptoms of arthritis (eg, osteoarthritis, rheumatoid arthritis, or juvenile rheumatoid arthritis), such as inflammation, swelling, stiffness, and joint pain. Celebrex is a sulfonamide and can cause serious skin effects. Stop Celebrex immediately if any type of rash develops and contact your doctor as soon as possible. Celebrex, which is used to treat certain types of arthritis and pain, can cause side effects. Learn about its more common, mild, and serious side effects and how to manage them. Celebrex is a nonsteroidal anti-inflammatory drug (NSAID) used to treat arthritis, menstrual cramps, and other types of short-term pain. NSAIDs, including CELEBREX, can lead to new onset of hypertension or worsening of preexisting hypertension, either of which may contribute to the increased incidence of CV events. Overview: Celecoxib is used for pain and swelling caused by arthritis and other conditions. Common side effects include stomach pain, upset stomach, heartburn, nausea, or dizziness. Celebrex (celecoxib) is a medication that treats mild to moderate pain and inflammation. It’s a type of NSAID. Celebrex (celecoxib) is a prescription capsule used for osteoarthritis, other forms of arthritis, pain, and menstrual cramps. Learn about side effects and more.