1. Arachidonic acid is released from cell membranes and metabolized via either the cyclooxygenase pathway or lipoxygenase pathway to produce prostaglandins, thromboxanes, leukotrienes, and lipoxins. 2. These metabolites are involved in various physiological and pathological processes such as inflammation, hemostasis, smooth muscle contraction, and pain sensation. 3. Nonsteroidal anti-inflammatory drugs function by inhibiting cyclooxygenase, thereby blocking prostaglandin production and reducing inflammation.