Ayurveda texts and modern research back the following facts:Holy Basil (Tulasi) possesses potent antihistamine properties, which protect against pollen-induced bronchospasms. Holy Basil is used in catarrh (mucous membrane inflammation of the respiratory tract) due to its varied pharmacological usages.Honey (Madhu) is traditionally used to treat cough, due to its anti-inflammatory properties, which soothe the respiratory tract. It inhibits the production of nitric oxide, which renders the herb its antioxidant property. This action is helpful in alleviating allergic respiratory disorders.Licorice (Yashtimadhu) has antitussive, expectorant and immune-enhancing properties that are helpful in relieving cough