“…Dextran, egg white, and formalin have been widely used to induce edema in the feet of rats; edema produced by these agents can be inhibited by anti-inflammatory stetoids, by antihistaminic or anti serotonin com pounds (69,87,113,245), or by a variety of other agents which are not specifically anti-inflammatory (239), but not by nontoxic doses of phenylbu tazone, indomethacin, or flufenamic acid (129,197,239,245). Since the last three compounds are unquestionably active anti-inflammatory and antirheu matic agents, the phlogistic materials listed above may be considered to be unsuitable for screening for such compounds (129,245).…”