Potter's sugar free pastilles are sugar free & have been formulated to bring effective relief of the symptoms of bronchial catarrh, coughs & colds. The active ingredients have decongestant & expectorant properties that unblock properties the respiratory system, relieve the symptoms of bronchitis & sinusitis & help soothe a cough. As an alternative, doctors can also prescribe medication that can assist with flu. Please visit our Online Doctor service to proceed with an influenza consultation. Our UK registered GP will review your details & if appropriate can provide a prescription for the main treatments for influenza.