"Anti-inflammatory" is an adjective, defined as "acting to reduce certain signs of inflammation, as swelling, tenderness, fever and pain." The word can also function as a noun, referring to a medication designed to reduce inflammation.
Inflammation is a physical condition that can cause a part of the body to swell and become red, tender and painful. It is the body's natural reaction to a variety of infections and injuries. Anti-inflammatory medications can reduce the effects of inflammation. These medications do not usually require a doctor's prescription; they can be purchased at pharmacies. Common anti-inflammatory medications include aspirin, cortisone and ibuprofen.