The purpose of the present invention is to provide a technique with which adsorption, onto a container, of chlorpheniramine and/or a salt thereof in a solution having a pH of at least 7.0 and including chlorpheniramine and/or the salt thereof, is inhibited, and the chlorpheniramine and/or the salt thereof is stably maintained. By employing a polybutylene terephthalate-containing resin as a resin for configuring inner wall surfaces (such as a wall surface around an internal space of a pour-out part and/or a lid wall surface facing a pour-out opening of the pour-out part) of a container for accommodating a solution which includes chlorpheniramine and/or a salt thereof, and which has a pH of at least 7.0, adsorption of the chlorpheniramine and/or the salt thereof onto the inner wall surfaces can be inhibited, and the content of the chlorpheniramine and/or the salt thereof in the solution can be stably maintained.
