Inhibition of Allergic Reactions by Cromoglycate and by a New Antiallergy Drug U-42,585E

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Abstract
Immediate type hypersensitivity to Ascaris antigen in Rhesus reactor monkeys was used to assess the pharmacologic profile of cromolyn Na (DSCG) and a new inhibitor of IgE-mediated lung function changes (U-42,585E). Two parameters used to measure lung function, respiratory rate increase and tidal volume decrease, were significantly altered in a dose-related fashion by U-42,585E when the latter was administered either by the intravenous, intrabronchial, or the oral route. Oral activity of U-42,585E was demonstrated with doses as low as 5 mg/kg in Ascaris reactor primates.