DIFFLAM COUGH LOZENGES – BLACKCURRANT 12 Difflam Cough lozenges temporarily reduces coughing, relieves sore, inflamed throats. Difflam Cough lozenges contain a cough suppressant and an anti-inflammatory agent to reduce coughing and relieve the symptoms of a sore throat. Difflam cough lozenges also contain an anti-bacterial agent.