Ascoril Plus Expectorant belongs to a class of respiratory medication called 'expectorant' primarily used to treat cough. It helps in dissolving hard phlegm (sputum/cough), which makes breathing difficult, usually in respiratory problems like allergies, sinusitis, common cold, bronchitis, flu etc. Coughing (dry or productive) is the body's way of clearing irritants (like allergens, mucus or smoke) from airways and preventing infection.