After subjects sign the written informed consent form (Visit 1), they will enter the SCREENING phase to check the eligibility within 7 days before the 1st dose of FP 0.05% cream. During SCREENING phase, investigator will collect subjects' demographic data, medical history, Atopic Dermatitis' diagnosis and treatment history, concomitant medications. Investigator needs to assess AD Severity and conduct physical examination. Substance abuse will be evaluated. And pregnant test must be conducted to check for Women of childbearing potential (WOCBP).