Fexotwist M Mango Flavour Oral Suspension 60 ml is used to treat allergic symptoms like sneezing, runny nose, congestion, stuffy nose or watery eyes. It contains Montelukast and Fexofenadine, which work by blocking the action of histamine, a substance responsible for causing allergic reactions. Some people may experience drowsiness, headache, skin rash, diarrhoea, nausea, vomiting, dizziness and fever. 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.