Works as intended for the purposes as described on the Mucinex box. From the box; "Mucinex Chest Congestion Guaifenesin 600 mg Tablets Expectorant (Cough Medicine), 20 Count" I said the exact same thing in my initial review of this product but it was denied by the moderators. Not sure what that's all about? 鶹 should either get better moderators or fix their AI algorithms.