propranolol ( a beta-adrenoceptor blocker ) and indomethacin ( a pg-synthetase inhibitor ) suggesting non-participation of h1 , h2-histamine receptors , beta-adrenoceptors ( catecholamine release ) and prostaglandin release in histamine-induced broncho-relaxations in the cat .
C0034783
adrenoceptor
C0001643
beta-adrenoceptors