Buckhorn Plantain (Plantago lanceolata) has a long history of use in traditional herbal medicine, particularly in Europe and parts of Asia. It has been used for a variety of ailments, most commonly for respiratory issues such as coughs, bronchitis, and sore throat. The use of Buckhorn Plantain to support or treat chest pain is based mainly on its traditional applications as an expectorant and anti-inflammatory agent. Historical texts and ethnobotanical sources often mention its use for soothing the mucous membranes of the respiratory tract, which could indirectly relieve discomfort associated with chest congestion or irritation from coughing.

However, there is very limited direct scientific evidence validating the use of Buckhorn Plantain specifically for chest pain (angina or cardiac-related pain). Most modern studies focus on its anti-inflammatory, antimicrobial, and wound-healing properties, with some support for its efficacy in treating mild respiratory complaints. These properties might offer symptom relief for chest discomfort related to cough or minor respiratory infections but not for chest pain arising from cardiac causes.

Overall, the use of Buckhorn Plantain for chest pain is justified by tradition rather than robust scientific validation, and any use for this purpose should be approached with caution, especially since chest pain can signal serious medical conditions requiring professional evaluation.