I also went to yu yan san and bought six bottles of it. The sales said if mixed with milk, the effect will decrease. In fact, my bb drank it with me for the past three days, she became better. Maybe if she had drank it separately, the effect will be better.
however, I was so sad that today she coughs a lot, cos my mother gave her 益力多 and cake with cream yesterday. She coughed so seriously today.