NCIt definition : A water-soluble para-aminophenol derivative and ester prodrug of acetaminophen in
which acetaminophen is bound to the carboxylic acid diethylglycine, with analgesic
and antipyretic activities. Upon intravenous administration, propacetamol is hydrolyzed
by plasma esterases into its active form acetaminophen. Although the exact mechanism
of action has yet to be fully elucidated despite its widespread use, acetaminophen
enters the central nervous system and acts centrally. This agent binds to cyclooxygenase
(COX) and prevents the metabolism of arachidonic acid to prostaglandin. A reduction
in prostaglandin formation relieves pain and reduces fever. Acetaminophen may also
act centrally on cannabinoid receptors and on N-methyl-D-aspartate (NMDA) receptors.;