Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Fennel (Foeniculum vulgare) has a long history of use in traditional medicine systems for alleviating digestive disturbances, including nausea and vomiting. In traditional Persian, Ayurvedic, and Unani medicine, fennel seeds and extracts have been prescribed as carminatives—agents that relieve flatulence and aid digestion—and as remedies for various gastrointestinal complaints. Folk remedies often recommend fennel tea for calming the stomach and reducing nausea after meals.

While traditional use is well documented, scientific evidence specifically supporting fennel’s efficacy for nausea and vomiting is relatively limited. Most modern research on fennel focuses on its antispasmodic, anti-inflammatory, and carminative effects, which may indirectly contribute to relief from nausea. A few small clinical studies and animal experiments have shown fennel extract may help reduce symptoms of dyspepsia and intestinal discomfort, but robust, high-quality trials targeting nausea and vomiting specifically—especially in contexts such as pregnancy (morning sickness), chemotherapy, or post-operative care—are lacking.

In summary, the use of fennel for nausea and vomiting is primarily justified by traditional evidence, with its carminative and soothing effects on the digestive tract providing a plausible rationale. However, scientific validation is modest, and further high-quality studies are needed to confirm its efficacy and safety for these indications.

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