Anti-allergic agents of N-aromatic 1H-(or 2H) tetrazole-5-carboxamide derivation present the following formulae: ##STR1## in which R.sup.1 is --CN or --CONH.sub.2 ; R.sup.2 is hydrogen, lower alkyl, lower alkoxy, halo, polyhalo(lower)alkyl, lower alkyl carbonyl or carb(lower)alkoxy; X is --CH.sub.2 --, ##STR2## where R.sup.3 is lower alkyl and R.sup.4 is hydrogen or lower alkyl; Or a pharmaceutically acceptable salt thereof.
N-芳香基1H-(或2H)
四唑-5-羧酰胺衍
生物的抗过敏药物具有以下结构式:##STR1##
其中,R1为--CN或--CONH2;R2为氢,低碳基,低烷氧基,卤素,多卤素(低)烷基,低碳基羰基或羰(低)烷氧基;X为--
CH2--,##STR2##
其中,R3为低碳基,R4为氢或低碳基;或其药学上可接受的盐。