Orris root (Iris germanica or Iris florentina) has a long history of use in traditional herbal medicine, particularly in European herbalism. Historically, orris has been included in remedies aimed at digestive complaints, including indigestion and belching (eructation). Old herbal texts sometimes mention orris root as a mild digestive stimulant and carminative, used to alleviate symptoms like bloating and excessive gas, which can contribute to belching. The root was often powdered and combined with other aromatic herbs to make digestive pastilles or teas.

However, there is little modern scientific evidence to support these uses. The phytochemical profile of orris root includes irone compounds (which provide its characteristic scent) and some starches, but there is no robust clinical research demonstrating efficacy for belching or related gastrointestinal symptoms. Additionally, orris root is seldom used in contemporary herbal practice for digestive complaints, partly due to concerns about potential toxicity and allergenicity. Contemporary references to orris for belching almost exclusively cite historical or traditional use, rather than clinical trials or pharmacological studies.

In summary, orris root’s use for belching is justified by tradition rather than science, and the evidence is weak and primarily anecdotal.