Which NSAID is commonly used to treat arthritis?

Celecoxib is a non-steroidal anti-inflammatory drug (NSAID) that is specifically designed to treat pain and inflammation associated with conditions such as arthritis. It works by inhibiting certain enzymes in the body (COX-2) that contribute to inflammation and pain, thus providing relief for those experiencing arthritic symptoms.

In contrast, the other options listed serve different purposes: Alendronate is primarily used to treat osteoporosis by inhibiting bone resorption, Methotrexate is a disease-modifying antirheumatic drug (DMARD) that is used in certain types of arthritis but is not classified as an NSAID, and Azithromycin is an antibiotic used to treat bacterial infections, not arthritis. This distinction highlights why Celecoxib is the appropriate choice for treating arthritis-related issues, focusing specifically on its role in alleviating inflammation and pain characteristic of the condition.