Yes, this combination medicine containing paracetamol, chlorpheniramine, and phenylephrine can help relieve your daughter's fever, runny nose, and cold-related cough. However, the safest and most accurate dosage must be determined by her weight, not just her age. Please consult your paediatrician to get the precise dose for her. In the meantime, ensure she gets plenty of rest and fluids. Avoid giving her any other medications containing paracetamol or cold remedies at the same time to prevent an accidental double dose.