<prompt> Psychological antagonist is found inIsoprenaline and sulbutamolIsoprenaline and adrenalineIsoprenaline and propranololAdrenaline and histamine  <response>: Ref Katzung 12e p20 Physiological antagonists are those drugs that produce opposite action by acting on different receptors. Adrenaline reverses the bronchoconstrictor action of histamine . H1 receptors by causing bronchodilation through beta2 receptors. Therefore,these are physiological antagonists. 