A Study of Baricitinib (LY3009104) in Participants With Moderate to Severe Atopic Dermatitis

This open-label study will evaluate the long-term efficacy and safety of baricitinib in adult participants with moderate to severe atopic dermatitis (AD).


Eligibility Criteria:
Have participated in Study JAIW (NCT03435081), and meet specific completion requirements for that study, and do not meet any of the following Exclusions:

* Have significant uncontrolled cerebro-cardiovascular (e.g., myocardial infarction \[MI\], unstable angina, unstable arterial hypertension, severe heart failure, or cerebrovascular accident), respiratory, hepatic, renal, gastrointestinal, endocrine, hematologic, neuropsychiatric disorders, or abnormal laboratory values that developed during a previous baricitinib study that, in the opinion of the investigator, pose an unacceptable risk to the participant if investigational product continues to be administered.
* Have a known hypersensitivity to baricitinib or any component of this investigational product.
* Had investigational product permanently discontinued at any time during a previous baricitinib study, except for participants who had investigational product discontinued during originating study because of rescue with an oral systemic AD therapy (e.g., corticosteroid, cyclosporine, methotrexate).
* Had temporary investigational product interruption continue at the final study visit of a previous baricitinib study and, in the opinion of the investigator, this poses an unacceptable risk for the participant's participation in the study.
* Pregnant or breastfeeding

OR

• Have not participated in a Study JAIW (NCT03435081) and satisfy the following criteria:

Inclusion Criteria:

* Have a diagnosis of atopic dermatitis (AD) at least 12 months before screening.
* Have moderate to severe AD, including all of the following:

  * EASI score ≥16
  * IGA score of ≥3
  * 10%- 50% BSA involvement
* Have had inadequate response or intolerance to existing topical (applied to the skin) medications within 6 months preceding screening.
* Are willing to discontinue certain treatments for eczema (such as systemic and topical treatments)
* Agree to use emollients daily.

Exclusion Criteria:

* Are currently experiencing or have a history of other concomitant skin conditions (e.g., psoriasis or lupus erythematosus), or a history of erythrodermic, refractory, or unstable skin disease that requires frequent hospitalizations and/or intravenous treatment for skin infections.
* A history of eczema herpeticum within 12 months, and/or a history of 2 or more episodes of eczema herpeticum in the past.
* Participants who are currently experiencing a skin infection that requires treatment, or is currently being treated, with topical or systemic antibiotics.
* Have any serious illness that is anticipated to require the use of systemic corticosteroids or otherwise interfere with study participation or require active frequent monitoring (e.g., unstable chronic asthma).
* Have been treated with the following therapies:

  * monoclonal antibody for less than 5 half-lives before randomization
  * received prior treatment with any oral Janus kinase (JAK) inhibitor less than 4 weeks before randomization
  * received any parenteral corticosteroid administered by intramuscular or intravenous injection within 6 weeks of planned randomization or are anticipated to require parenteral injection of corticosteroids during the study
  * have had an intra-articular corticosteroid injection within 6 weeks of planned randomization
  * probenecid at the time of randomization that cannot be discontinued for the duration of the study
* Have high blood pressure characterized by a repeated systolic blood pressure \>160 millimeters of mercury (mm Hg) or diastolic blood pressure \>100 mm Hg.
* Have had major surgery within the past eight weeks or are planning major surgery during the study.
* Have experienced any of the following within 12 weeks of screening: myocardial infarction (MI), unstable ischemic heart disease, stroke, or New York Heart Association Stage III/IV heart failure.
* Have a history of venous thromboembolic event (VTE), or are considered at high risk for VTE.
* Have a history or presence of cardiovascular, respiratory, hepatic, gastrointestinal, endocrine, hematological, neurological, lymphoproliferative disease or neuropsychiatric disorders or any other serious and/or unstable illness.
* Have a current or recent clinically serious viral, bacterial, fungal, or parasitic infection including herpes zoster, tuberculosis.
* Have specific laboratory abnormalities.
* Have received certain treatments that are contraindicated.
* Pregnant or breastfeeding.