TLDR  Dupilumab can both heal and cause hair loss.   
  The paper discussed the dual effects of dupilumab, an anti-IL4/IL13 monoclonal antibody, on patients with atopic dermatitis (AD) and alopecia areata (AA). While some patients experienced healing of AA during dupilumab treatment for AD, others developed AA as a side effect. The authors reported two cases illustrating these contrasting outcomes, highlighting the complex and unpredictable nature of dupilumab's impact on AA.
                     19 citations
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  January 2019   in “JAAD case reports”    A medication for skin rash also unexpectedly treated hair loss in a patient.  
               33 citations
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  January 2019   in “Acta Dermato Venereologica”    Dupilumab may help regrow hair in people with atopic dermatitis.  
      49 citations
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  December 2018   in “JAAD case reports”
           49 citations
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  December 2018   in “JAAD case reports”    Dupilumab may cause significant hair loss, which can reverse after stopping the drug.  
      53 citations
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  January 2018   in “JAAD case reports”
           53 citations
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  January 2018   in “JAAD case reports”    Dupilumab for eczema may cause hair loss.  
    
  
        
               29 citations
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  July 2019   in “Dermatologic Therapy”    Dupilumab can both heal and cause hair loss.  
               33 citations
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  January 2019   in “Acta Dermato Venereologica”    Dupilumab may help regrow hair in people with atopic dermatitis.