the effects of 9-methyl-3- ( 1h-tetrazol-5-yl ) -4h-pyrido [ 1,2-a ] pyrimidin-4-one potassium salt ( tbx ) , a new antiallergic drug , on histamine release from lung fragments , experimental asthma and isolated tracheal muscle were investigated in guinea pigs .
C0024109
lung
C0004096
asthma