The use of Banyan (Ficus benghalensis) to support or treat nausea and vomiting is primarily grounded in traditional medicine, particularly within Ayurvedic and folk medicinal systems in South Asia. Historical texts and ethnobotanical surveys report that various parts of the Banyan tree—such as its bark, leaves, or latex—have been used for a range of ailments, including digestive complaints. Some traditional practitioners prescribe Banyan extracts or preparations for symptoms like indigestion, vomiting, or gastrointestinal distress. However, explicit references to its efficacy specifically for nausea and vomiting are limited and often anecdotal.

Scientific evidence supporting these traditional uses is minimal to nonexistent. Few pharmacological studies have directly evaluated the antiemetic (anti-nausea/vomiting) effects of Banyan. Most modern research has focused on other potential health benefits of Banyan, such as anti-inflammatory, antidiabetic, or antimicrobial properties. Therefore, while there is a basis in tradition for its use, the lack of rigorous clinical trials or mechanistic studies means the evidence for Banyan's efficacy in treating nausea and vomiting remains weak. The rating reflects the relatively low strength of evidence, which is rooted more in historical use than scientific validation.