Difflam lozenges provide fast relief of a sore throat by reducing inflammation, a cause of sore throat pain. It has an anti-bacterial action to help kill bacteria which can cause throat and mouth infections. Use this medicine for fast relief from the symptoms of Sore Throat. Pharyngitis. Tonsillitis. Mouth Ulcers. Swelling, redness and inflammatory conditions.Sugar free. Lactose free. Gluten free.