No, this combination may not be appropriate. Maxtra helps relieve a runny nose and nasal congestion, but it does not treat fever or body aches, which typically require paracetamol. Ambrodil-S contains Salbutamol, a bronchodilator meant for wheezing and airway spasms. It should not be used for a routine cough without a doctor's prescription, as it can cause side effects like a rapid heart rate and shakiness. Since the symptoms started yesterday, please consult a paediatrician. They will examine your child's chest and prescribe the correct, safe medications and dosages based on their weight.