This drug belongs to a class of drugs called nonsteroidal anti-inflammatory drugs (NSAIDs). NSAIDs block an enzyme called cyclooxygenase (COX). COX produce chemicals that cause pain and inflammation. By Thus, in turn, reduces pain and inflammation. Celecoxib is used for pain relief, osteoarthritis, rheumatoid arthritis, pain during menstruation and rheumatoid arthritis in people two years or older