<p>This tablet is a combination of Guaifenesin and Dextromethorphan HBr. Dextromethorphan is a cough suppressant and gives relief from cough by blocking the cough centre in the brain. Guaifenesin is an expectorant. It reduces the viscosity of cough by increasing the flow of fluids in the bronchial secretion thereby facilitating the expectoration of cough.</p>