Zoliprofen is a potent and orally available non-steroidal anti-inflammatory agent with anti-inflammatory, antipyretic and analgesic activity, and inhibits carobolin, mycobacterium, and knife-ball protein A-induced rat paw oedema, as well as anti-rat serum-induced fracture or dorsal skin oedema. Zoliprofen is 20 times more effective than ibuprofen and fenoprofen against collagen- or arachidonic acid-induced platelet aggregation in rats and rabbits. Zoliprofen was 20 times more effective than ibuprofen and fenoprofen in inhibiting endotoxin-induced diarrhoea in mice and arachidonic acid-induced acute mortality in rabbits.