New piperidine derivatives of benzimidazole of the formula: ##STR1## wherein n is 1 or 2 and R is lower alkyl, lower alkenyl or lower cycloal, or a pharmaceutically acceptable salt thereof, are useful antihistaminic and antiallergic agents.
上述式子中,n为1或2,R为低碳基、低烯基或低环烷基,或其药学上可接受的盐,是有用的抗
组胺和抗过敏剂。