Protizinic acid inhibits phospholipase A2 (PLA2) with an IC 50 of 210 μM. Protizinic acid has antiinflammatory and antipyretic activity which is an orally active non-steroidal antiinflammatory agent [1] [2].

Protizinic acid not only inhibits the in vitro generation of leukokinin but also antagonizes to it on the receptor site of leukokinin [1].

In vivo leukokinin (LK) generation system using feline acute ischemia model, When 3 mg/kg Protizinic acid is injected twice intravenously to cats with acute cardiac ischemia, increased blood acid protease activity is inhibited and significant inhibitory action on the decrease of leukokininogen, the precursor of leukokinin, is observed [1]. Oral administration of 30 mg/kg of Protizinic acid significantly inhibits arachidonic acid-induced erythema in guinea pigs [2].