The toilet or pour them into a drain unless instructed to do so. For the shortest possible time necessary to relieve your symptoms. Celecoxib is a nonsteroidal anti-inflammatory drug that is used to treat arthritis, acute pain, and menstrual pain and discomfort. The shortest possible time necessary to relieve your symptoms. Celecoxib is a nonsteroidal anti-inflammatory drug that is used to treat arthritis, pain, menstrual cramps, and colonic polyps.