A kit product including a bag which contains an infusion solution or pure water； and at least one drug-enclosing portion in which a drug is enclosed and which includes a sealing portion, wherein drug preparation is enabled by connecting the drug-enclosing portion and the bag via the sealing portion and opening the sealing portion to bring the bag into communication with the drug-enclosing portion, thereby charging the drug into the bag, and wherein the kit product enables dose adjustment of the drug.
