Ibuprofen is a non-steroidal anti-inflammatory drug (NSAID) and non-selective cyclooxygenase inhibitor indicated for the treatment of mild-moderate pain, fever, and arthritis.  Its analgesic, antipyretic, and anti-inflammatory properties are thought to be mediated through inhibition of the cyclooxygenase-2 (COX-2) enzyme.  COX-2 is upregulated by cells during the inflammatory response, resulting in increased production of PGE2 and leading to tissue inflammation, fluid extravasation, pyrexia, pain, and vasodilation.  Inhibition of prostaglandin synthesis by ibuprofen blocks inflammatory signaling pathways and decreases pain and body temperature.