Inula, particularly Inula helenium (elecampane), has a long history of use in traditional herbal medicine for respiratory conditions, including rhinitis. Traditional systems such as Traditional Chinese Medicine (TCM) and European herbalism have employed Inula for its expectorant, anti-inflammatory, and soothing properties in the treatment of coughs, bronchitis, and other upper respiratory tract conditions. The root contains compounds such as sesquiterpene lactones (e.g., alantolactone and isoalantolactone), which are believed to contribute to its effects in easing respiratory symptoms.

While these traditional uses include alleviating symptoms associated with rhinitis (nasal congestion, runny nose, and inflammation of the nasal mucosa), direct high-quality scientific studies specifically validating Inula for rhinitis are limited. Some in vitro and animal studies suggest anti-inflammatory and antimicrobial properties for extracts of Inula, which could theoretically benefit rhinitis, particularly if infection or allergic inflammation is involved. However, clinical trials in humans specifically targeting rhinitis are lacking.

In summary, the use of Inula for rhinitis is primarily justified by traditional use, with only indirect or low-level scientific support for its efficacy. The evidence rating reflects a reliance on historical practices and preclinical findings rather than robust clinical validation.