“Utilizing platelets whose … have found that local anesthetics , chlorpromazine and propranolol block: (a) formation of 14C-thromboxane B2, 14C-prostaglandins and 14C-hydroxyacids (12-L-hydroxy-5,8,…) from endogenous (phospholipid) 14C-archidonate; and (b) block the fall in the 14C-arachidonate content of platelet phospholipids, especially phosphatidyl choline.”