Alday Ag 100Ml Syp is used to treat a cough with mucus. It contains cetirizine hydrochloride, ambroxol hydrochloride, and guaiphenesin, which acts by blocking allergies with cetirizine, thins mucus with ambroxol, and loosens mucus with guaifenesin, providing relief from cough and congestion. In some cases, this medicine may cause side effects such as vomiting, diarrhea, heartburn, stomach pain, dryness in the mouth, dizziness, headache, sleepiness, allergic reactions, and rash. Before taking this medicine, inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.