The reason why Blue Pen Syrup is the best

I believe that the most preferred and safest to give to children is Bluefen syrup. The main reason is that it has been around for a long time, and I think it's no coincidence that it holds the top market share. Buying it at the pharmacy rather than a convenience store is about 3,000 won cheaper, and the quantity is larger, so once it's finished, I consistently purchase it from the pharmacy like an over-the-counter medication!!!