Bayekening Granules are a traditional Chinese medicine formulation primarily used to alleviate symptoms associated with pertussis (whooping cough) and other respiratory conditions characterized by persistent, paroxysmal coughing. Clinically, the granules are indicated for wind-heat invading the lungs—manifesting as frequent, forceful coughing, thick yellow phlegm, sore throat, fever, and nasal congestion. The formula is designed to clear heat, resolve phlegm, soothe the lungs, and suppress cough.

The herbal composition typically includes key ingredients such as Flos Farfarae (coltsfoot flower), Folium Eriobotryae (loquat leaf), Fructus Forsythiae (forsythia fruit), and Rhizoma Chuanbeimu (Sichuan fritillary bulb)—all selected for their documented expectorant, anti-inflammatory, and bronchodilatory properties in traditional practice. Modern pharmacological studies suggest certain constituents may modulate airway inflammation and reduce tracheobronchial hyperreactivity, though robust clinical trial data in Western populations remain limited.

While Bayekening Granules are widely prescribed in China as an adjunctive therapy for pediatric and adult cough syndromes, they are not a substitute for evidence-based antimicrobial treatment in confirmed bacterial pertussis caused by Bordetella pertussis. Healthcare providers emphasize that diagnosis should be confirmed via PCR or culture, and appropriate antibiotic therapy—such as azithromycin or clarithromycin—must be initiated promptly, especially in infants and immunocompromised individuals.

Contraindications include known hypersensitivity to any component, pregnancy (due to insufficient safety data), and use in children under two years without physician supervision. Potential adverse effects are generally mild and may include gastrointestinal discomfort or transient rash. As with all herbal products, interactions with conventional medications—particularly anticoagulants or sedatives—should be evaluated prior to concurrent use.