The primary objective of this study was to evaluate the efficacy of TPO-RAs' transformation in Chinese ITP patients older than 14 years who had not responded to first-line in the previous treatment.~100 eligible subjects will be enroll ed in this study.The dose will be adjusted according to the subject platelet count during the period from week 1 to week 6.
This multi-center study aims to study the efficacy of TPO-RAs' transformation in Chinese ITP patients older than 14 years. This study will be conducted in ITP patients who had not responded to first-line in the previous treatment .