“Intravenous pretreatments with prazosin (0.5 mg/kg), an alpha1 adrenoceptor antagonist, [beta-mercapto-beta,…, O-Me-Tyr2-Arg8]-vasopressin (10 microg/kg), a vasopressin V1 receptor antagonist, or saralasin (250 microg/kg), an angiotensin II receptor …, partially blocked the pressor response to arachidonic acid (150 microg; ….c.v.)”