Runny nose, watery eyes, and dry cough together are most often seen in allergies or sometimes a viral cold, and levocetirizine may help, but it does not always fully control symptoms if the trigger, like dust, pollution, weather change, or ongoing exposure, is still present. The dry cough can also happen because mucus keeps dripping back from the nose into the throat, which keeps irritating it and makes the cough feel worse even after taking medicine. In such situations, continuing the same tablet for a few days may still be fine if symptoms are mild, but adding simple supportive care often makes a big difference, like steam inhalation, warm fluids, and saline nasal rinses to clear irritants from the nose. Avoiding cold air, dust, and strong smells also helps reduce flare-ups. If symptoms are clearly worsening, disturbing sleep, or not improving after a few days, a doctor may need to reassess and consider adding a nasal spray or changing treatment based on whether it is mainly allergy or infection. If fever, chest discomfort, wheezing, or thick, discoloured mucus appear, it should be checked early.