Pranlukast is a cysteinyl leukotriene receptor-1 antagonist. It antagonizes or reduces bronchospasm caused, principally in asthmatics, by an allergic reaction to accidentally or inadvertently encountered allergens.
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Naturally occurring flavones and pharmacologically important tetrazole drugs: Artonin A, Semiglabrin, Kaempferol, Candesartan, Pemiroplast, Pranlukast.