“The order of potency of the inhibitory effects on the arachidonic acid release were: homochlorcyclizine, clemastine , and azelastine (IC50 less than 20 microM) greater than oxatomide (IC50 less than 60 microM) and diphenylpyraline greater than triprolidine, meclizine, diphenhydramine (IC50 greater than 100 microM).”