Anti-inflammatory or antiinflammatory refers to the property of a substance or treatment that reduces inflammation or swelling. Anti-inflammatory drugs make up about half of analgesics, remedying pain by reducing inflammation as opposed to opioids, which affect the central nervous system.

Antirheumatic drugs is a category of otherwise unrelated drugs defined by their use in rheumatoid arthritis to slow down disease progression.[1][2] The term is often used in contrast to non-steroidal anti-inflammatory drug (which refers to agents that treat the inflammation but not the underlying cause) and steroids (which blunt the immune response but are insufficient to slow down the progression of the disease).