Where can I find Stomach tea in Fernwald?

Stomach tea can also be found in these cities:

Buseck Butzbach Giessen Hüttenberg Langgöns Lich Linden Lollar Mücke Pohlheim Rabenau Rockenberg Staufenberg Wettenberg Wetzlar

You can also find this in Fernwald:

Curry Gingerbread Apricots Lamb's Lettuce Cocktail Tomatoes Mushrooms Starting Milk Pre Speculoos Baguette Yeast Dry