Montu-L Syrup is a medication prescribed for children to treat allergies, asthma, and skin allergies. It should be given with the prescribed dose and time. It may cause minor side effects like vomiting, diarrhea, nausea, dizziness, dry mouth, rash, and headache. If these persist or bother the child, consult a doctor. It is important to inform the doctor about the child's medical history, including any allergies, heart problems, blood disorders, vascular disorders, birth defects, airway obstruction, lung anomaly, skin disorder, liver impairment, and kidney malfunction, to plan the child's treatment.