Vibupro- Cough & sore throat formula Honey & Propolis. Buckwheat honey is known to have higher levels of antioxidants and other phenolic compounds. A 2007 research study at Penn State University College of Medicine found honey to be most effective in reducing cough severity and frequency in young children when compared to dextroamphetamine (DM), the most common over the counter antitussive. Propolis (a natural substance gathered by the honey bees). It has bactericidal, antitoxic, anathesic, anti - inflammatory, regenative and analgesic action. Propolis has been used successfully in treatments where standard methods have failed.