As users currently do with most other types of blood glucose test strips on the market, they can simply check the expiration date clearly printed on their vial of the Accu-Chek Active test strips. After this date, any remaining test strips should be discarded and patients should use a new vial of test strips. This method is simpler than some other competitive strips, which still require the user to calculate and write their expiration date on their vial. Users should never test with expired test strips.