A data output method in analysis of a sample, the method comprising: a step of reading test subject identification information recorded on an information recording portion of a sample container by reading means provided at an analytical device; and a data output step (S8; S10) of outputting data on analysis results of a sample contained in the sample container by using a data output means provided at the analytical device; the method further comprising: a step of acquiring, from a source external to the analytical device, drug administration information on the test subject corresponding to the test subject identification information read out by the reading means; and a step of determining whether contents of the drug administration information are contents affecting the analysis results of the sample, wherein in the event that a determination result in the determining step indicates that the contents of the drug administration information are contents affecting the analysis results of the sample, in the data output step, the data on the drug administration information are outputted together with the data on the analysis results, and in the event that the determination result in the determining step indicates that the contents of the drug administration information are not contents affecting the analysis results of the sample, in the data output step, the data on the drug administration information are not outputted together with the data on the analysis results, or data indicating that the analysis results are not affected by the drug administration are outputted. a step of reading test subject identification information recorded on an information recording portion of a sample container by reading means provided at an analytical device; and a data output step (S8; S10) of outputting data on analysis results of a sample contained in the sample container by using a data output means provided at the analytical device; the method further comprising: a step of acquiring, from a source external to the analytical device, drug administration information on the test subject corresponding to the test subject identification information read out by the reading means; and a step of determining whether contents of the drug administration information are contents affecting the analysis results of the sample, wherein a step of acquiring, from a source external to the analytical device, drug administration information on the test subject corresponding to the test subject identification information read out by the reading means; and a step of determining whether contents of the drug administration information are contents affecting the analysis results of the sample, wherein in the event that a determination result in the determining step indicates that the contents of the drug administration information are contents affecting the analysis results of the sample, in the data output step, the data on the drug administration information are outputted together with the data on the analysis results, and in the event that the determination result in the determining step indicates that the contents of the drug administration information are not contents affecting the analysis results of the sample, in the data output step, the data on the drug administration information are not outputted together with the data on the analysis results, or data indicating that the analysis results are not affected by the drug administration are outputted.