Digestive medicine is Gas-Hwalmyeongsu.

Buchae Pyo Gas Hwal Myeong Su is said to be Korea's first digestive medicine.
It's a product that has become familiar through advertisements since childhood.
So, the first product that comes to mind when thinking of antacids is Gas Hwal-myeong-su.
When you feel bloated or think you have indigestion, drinking this gives a feeling of relief in your stomach.
It feels like the liquid form makes it more effective.

Famous products that have been around for a long time are usually for a reason.
This is a product that you purchase as an over-the-counter medication.