Prostacyclin, thromboxane A2 interactions in haemostasis and thrombosis.

Prostacyclin and thromboxane A2 are products of arachidonic acid which play a role in the regulation of haemostatic plug and thrombus formation. Aspirin inhibits the synthesis of both compounds but is more active in blocking TXA2 formation; based on this, aspirin is suggested to have an anti-thrombotic effect. Other possible approaches to the development of anti-thrombotic drugs are discussed.