Is allegra still good after it expires. Once the patent expires, the market is flooded . . it just gets weak when it expires. . Is an expired RX good up to five years?The shelf life of the Allegra is at least a year after the refill . . date. . . . . . Why replace our cars if they're still relatively in a good . . . . . create a bigger one - the original container is still . . . . the drug will completely go bad the day after it expires . . Is it safe to take Allegra-D after its expiration dat... more