Oxaprozin is a non-steroidal anti-inflammatory drug (NSAID) that is used to relieve pain and inflammation in conditions such as arthritis and tendonitis. It works by inhibiting the production of prostaglandins, which are responsible for inflammation and pain. Some common synonyms for oxaprozin include Daypro, Duraprox, and Oxaprozinum. These drugs are similar in their effects and are often used as alternatives to oxaprozin in the treatment of pain and inflammation. It is important to note that while these drugs may be effective in relieving pain, they are also associated with side effects such as stomach ulcers and bleeding disorders, so it is important to use them only under a doctor's supervision.