Iberogast is a tincture(mixture) of different herbs that are aimed at improving digestive motility(movement). Iberogast may also go by the name STW-5. It was developed in Germany in the 1960s and has been used for decades all over the world. There have also been studies that prove it’s effectiveness with no known side effects. Iberogast is not very well known in the USA and you probably will not find it at your local drugstore, but luckily Amazon.com carries Iberogast.