This study was a Phase 3, multicenter, open-label extension study of the long-term safety of roflumilast cream 0.15% (completers of studies ARQ-151-311 or ARQ-151-312 aged ≥6 years and ARQ-151-315 rollovers who turned 6 years of age on study) or roflumilast cream 0.05% (ARQ-151-315 rollovers aged 2 to 5 years). Participants with mild to moderate atopic dermatitis (AD) applied roflumilast cream once daily (qd) for up to 52 weeks.

Inclusion Criteria:

1. For adult subjects: Participants legally competent to sign and give informed consent. For pediatric and adolescent subjects: Informed consent of parent(s) or legal guardian, and, if age appropriate, assent by the subjects, as required by local laws.
2. Males and females, ages 2 years and older. (Only subjects 18 years and older will be enrolled at sites located in the province of Québec in Canada.)
3. Subjects with atopic dermatitis who met eligibility criteria for and successfully completed one of three preceding studies through Week 4, and are able and eligible to enroll into this long-term safety study on the Week 4 visit of the preceding study.
4. Females of childbearing potential (FOCBP) must have a negative urine pregnancy test at all study visits. In addition, sexually active FOCBP must agree to use at least one form of a highly effective or barrier method of contraception throughout the trial.
5. Females of non-childbearing potential should either be pre-menarchal, or post-menopausal with spontaneous amenorrhea for at least 12 months (post-menopausal status would have been confirmed with FSH testing in the preceding study) or have undergone surgical sterilization (permanent sterilization methods include hysterectomy, bilateral oophorectomy, or bilateral salpingectomy).
6. Subjects and parent(s)/legal guardian(s) are considered reliable and capable of adhering to the Protocol and visit schedule, according to the judgment of the Investigator.

Exclusion Criteria:

1. Subjects who experienced a treatment-related AE or a serious AE (SAE) that precluded further treatment with ARQ-151 cream in the preceding study.
2. Subjects that use any Excluded Medications and Treatments.
3. Subjects with skin conditions other than AD that would interfere with evaluations of the effect of the study medication on AD, as determined by the Investigator. Subjects with any condition on the treatment area which, in the opinion of the Investigator, could confound efficacy measurements.
4. Subjects with known genetic dermatological conditions that overlap with AD.
5. Females who are pregnant, wishing to become pregnant during the study, or are breast-feeding.
6. Subjects and parent(s)/legal guardian(s) who are unable to communicate, read or understand the local language(s), or who display another condition, which in the Investigator's opinion, makes them unsuitable for clinical study participation.
7. Subjects who are family members of the clinical study site, clinical study staff, or sponsor, or family members of enrolled subjects (subjects enrolled in other studies of ARQ-151 cream) living in the same house.