Efficacy and Safety Study of MSRD-100 in Subjects With Atopic Dermatitis >=3 Months of Age and Older

Key Inclusion Criteria: 1. Subjects who are male or female, ≥3 months of age on the date of Baseline Visit. 2. Subjects with a diagnosis of atopic dermatitis, active inflammation and meeting the Hanifin and Rajka Diagnosis Criteria for atopic dermatitis. 3. Subjects must have an Investigator Global Assessment (IGA) score of ≥2 at baseline. 4. Subjects who have atopic dermatitis covering ≥5% Body Surface Area (BSA) excluding the eyelids, perioral area, around the nostrils, and in the diaper area (for subjects who wear diapers or plastic pants). 5. Subjects who have atopic dermatitis with a sign and symptom score ≥ 2 on the following three signs and symptoms: erythema, infiltration/papulation, and erosion/oozing/crusting present in at least one body surface area affected. Key Exclusion Criteria: 1. Unstable course of atopic dermatitis (spontaneously improving or rapidly deteriorating) as determined by the investigator over the previous 4 weeks prior to baseline. 2. Concurrent conditions and history of other diseases. 3. Used any of the following treatments within the indicated washout period before the baseline visit or those who would require the following during the study. 4. Subjects who require treatment with any other topical or systemic therapy for the study disease other than bland emollients in untreated areas of disease.