adrenergic beta receptor drug pathway - beta-agonist and beta-blocker adrenergic beta receptor agonist and beta-blocker pharmacodynamics pathway 2010-07-01T09:12:37Z PW:0000801 SMP:00296 SMP:00297 The pathway of beta adrenergic drug-target interactions and of the biochemical or physiological responses to drug. The beta-agonists are used to stimulate while the beta-blockers are used to inhibit the action of adrenergic beta receptors, as necessary. Adrenergic beta receptors are G-protein coupled receptors that in response to epinephrine or norepinephrine elicit various sympathetic responses important for proper cardiac function and in the case of beta2 receptor, smooth muscle relaxation and bronchodilation. Genetic variations can cause differences in the response of the organism to the drug. pathway vpetri