Investigation of the Efficacy of 2.5% and 5% Cis-urocanic Acid in Patients With Moderate or Severe Atopic Dermatitis

2.5% cis-UCA in emulsion cream base twice daily, amount of a fingertip per one hand (i.e. palm + thumb + fingers) area, applied topically as a thin layer on the affected skin area of approximate size of maximally three hand areas for up to 28 days (one fingertip per one hand area)

5% cis-UCA in emulsion cream base twice daily, amount of a fingertip per one hand (i.e. palm + thumb + fingers) area, applied topically as a thin layer on the affected skin area of approximate size of maximally three hand areas for up to 28 days (one fingertip per one hand area)

The placebo for cis-UCA product (emulsion cream base) twice daily, amount of a fingertip per one hand area applied topically as a thin layer on the affected skin area on of approximate size of maximally three hand areas for up to 28 days (one fingertip per one hand area).

0.1% Protopic® twice daily, amount of a fingertip per one hand area applied topically as a thin layer on the affected skin area of approximate size of maximally three hand areas for up to 28 days (one fingertip per one hand area).