Moon Geun Young and Taecyeon banned from drinking

Why is actor�Moon Geun Young �prohibited from drinking? It is�due to her health.�She was diagnosed with Hepatitis A in early March, and her immunity level had dropped. The doctor strictly told her to stay away from alcohol. The problem is, on the first episode of Cinderella's Sister, the nation's sister might have to drink actual rice wine on a scene to make her acting more realistic.�The thought of using real wine was however discarded, due to her doctor's disapproval. 2PM's Taecyeon�(also part of the cast in the upcoming drama) was told to stay away from alcohol as well, which is pretty ironic, because he is part of a beer commercial. Hmm... What could be the reason for Taecyeon not being able to drink? The drama airs from March 31st.