NSAIDS have antipyretic activity and can be used to treat fever. [75] [76] Fever is caused by elevated levels of prostaglandin E2 , which alters the firing rate of neurons within the hypothalamus that control thermoregulation. [75] [77] Antipyretics work by inhibiting the enzyme COX, which causes the general inhibition of prostanoid biosynthesis ( PGE2 ) within the hypothalamus . [75] [76] PGE2 signals to the hypothalamus to increase the body's thermal set point. [76] [78] Ibuprofen has been shown more effective as an antipyretic than paracetamol (acetaminophen). [77] [79] Arachidonic acid is the precursor substrate for cyclooxygenase leading to the production of prostaglandins F, D & E.

FDA reviewed a meta-analysis of randomized clinical trials of cardiovascular and upper gastrointestinal events with non-aspirin nonsteroidal anti-inflammatory drugs (NSAIDs), conducted by the Coxib and traditional NSAID Trialists’ (CNT) Collaboration of the Clinical Trial Service and Epidemiological Studies Units at Oxford University. 2 We also reviewed observational studies and other scientific publications in the medical literature. 1 The findings of these studies were discussed at a joint meeting of the Arthritis Advisory Committee and Drug Safety and Risk Management Advisory Committee held on February 10-11, 2014 (for complete safety reviews, background information, and minutes of this meeting, click here ).