The present invention in general relates to a pharmaceutical suspension comprising nano-sized cocrystals of at least one active ingredient and at least one dicarboxylic acid. It in particular relates to a pharmaceutical suspension comprising nano-sized cocrystals of at least one anthelmintic drug and at least one dicarboxylic acid. The invention further relates to uses, methods for use and methods for manufacturing the pharmaceutical suspension according to this invention.本發明大體上關於一種包含具有至少一種活性成分及至少一種二羧酸之毫微大小共晶體的醫藥懸浮物。本發明尤其關於一種包含具有至少一種驅蟲藥及至少一種二羧酸之毫微大小共晶體的醫藥懸浮物。本發明進一步關於根據本發明之醫藥懸浮物的用途、使用方法及製造方法。