Dugodex Sugar Free Syrup 100 ml is used to treat dry cough. It contains Chlorpheniramine and Dextromethorphan, which work by blocking the transmission of nerve signals from the cough centre in the brain to the muscles that produce cough. Also, it blocks the action of histamine, a substance responsible for causing allergic reactions. Thus, it helps relieve overall cough, cold and allergic symptoms. Some people may experience side effects such as dry mouth, throat or nose, drowsiness, blurred vision, constipation, dizziness, restlessness or excitation. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.