Belleric myrobalan (Terminalia bellirica) is a traditional medicinal plant used in Ayurveda and other systems of traditional medicine, often as part of the "Triphala" formulation. In these traditions, Belleric myrobalan is considered to support respiratory health and is sometimes recommended for conditions characterized by cough, mucus, or breathing difficulties. Its use for respiratory disorders such as Chronic Obstructive Pulmonary Disease (COPD) is thus grounded in ethnomedicinal practice rather than robust clinical evidence.

Scientific studies on Belleric myrobalan specifically for COPD are scarce. Some in vitro and animal studies suggest that extracts from the fruit possess antioxidant, anti-inflammatory, and antimicrobial properties, which could theoretically benefit respiratory health and mitigate some pathogenic mechanisms of COPD. However, there have been no high-quality clinical trials directly evaluating its efficacy or safety in COPD patients. Thus, while the use of Belleric myrobalan for COPD is justified by traditional use, scientific evidence supporting its use for this specific condition remains limited and preliminary.

In summary, Belleric myrobalan's use in COPD is supported primarily by tradition, with limited experimental data suggesting possible mechanisms of action, but lacking clinical validation.