“Chloroquine, propranolol and trifluoperazine were the most potent drugs investigated, inhibiting … binding of adrenergic antagonists at 10(-5)M. Drugs such as salicylate and chlorpropamide, with little affinity for … high capacity for binding to albumin , inhibited lymphocyte transformation at 10(-3)M; …-bound ligands with an affinity for adrenoceptors.”