Celecoxib is approved by the FDA for use in children ages 2 and older for treatment of juvenile rheumatoid arthritis (JRA). Celecoxib is on the Children's Hospital of Philadelphia (CHOP) formulary for use in (1) patients >= 2 years old for JRA, (2) patients >= 12 years old and >=40 kg who have increased risk for gastrointestinal (GI) adverse effects or bleeding concerns precluding use of traditional nonsteroidal anti-inflammatory drugs (NSAIDs), and (3) oncology patients with surface area >= 0.4 square meters for anti-angiogenesis. Celecoxib is approved by the FDA for use in adults for treatment of arthritic conditions, acute/ postoperative pain, and primary dysmenorrhea, and has been widely used since its introduction in 1998.