Covonia Double Action Cough Lozenges Berry Blast Lozenges are powerful lozenges which have been specially formulated and hand-made the traditional way by Thornton & Ross in Huddersfield. These warm, berry flavoured pastilles include double action properties that help relieve the symptoms of cold, flu and sore throat. Covonia Double Action Cough Lozenges Berry Blast Lozenges have two coloured sides, each one formulated to provide a different action. The clear side contains ingredients which help to clear your nose and throat. The other side is brown and contains a warming berry flavour, which helps to relieve dryness and soreness in the mouth and throat. Covonia Double Action Cough Lozenges Berry Blast Lozenges are non-drowsy, gluten-free and suitable for vegetarians.