Balloon Flower (Platycodon grandiflorus) has a long history of use in traditional East Asian medicine, particularly within Chinese and Korean herbal systems. Traditionally, the root of Balloon Flower—known as "jie geng" in Chinese medicine—has been used for a variety of respiratory and digestive complaints. While its most prominent traditional uses are for cough, sore throat, and respiratory tract infections, some historical texts and folk practices also suggest its use for digestive issues, including nausea and vomiting. However, these applications are not as well-documented or emphasized as its respiratory uses.

In terms of scientific validation, there is limited modern research specifically evaluating Balloon Flower's efficacy for nausea and vomiting. Some studies have explored its general anti-inflammatory, immunomodulatory, and expectorant properties, but targeted clinical trials for gastrointestinal symptoms are scarce or nonexistent. Therefore, while there is a traditional precedent for its use in treating nausea and vomiting, this is not robustly supported by contemporary scientific research. The evidence, therefore, is based primarily on traditional use rather than on rigorous clinical validation.