Celebrex (Celecoxib) is a form of non-steroidal anti-inflammatory drug that directly targets COX-2 enzyme to block the inflammatory signaling and has been approved to treat colon cancer. In our preliminary findings, Celecoxib significantly inhibited cell growth,proliferation, migration, invasion and epithelial-mesenchymal transition programs in oral squamous cell carcinoma cell (OSCC) lines. The Institutional Review Board in China Medical University Hospital (CMUH) has approved the combination treatment of concurrent radiotherapy (RT) and/or Cisplatin with or without Celecoxib in a phase II clinical trial for relapse-free primary OSCC patients.