I understand how worrying it is when your little one is unwell. Please do not give Levolin Plus (which contains levosalbutamol, ambroxol, and guaifenesin) to your 8-month-old baby without consulting a pediatrician first. This medication is typically used for chest congestion and is not suitable for a simple dry cough. In infants, cough medicines can have side effects and must only be given under strict medical supervision. A doctor will need to examine your baby's chest and prescribe the exact dosage based on their weight. For now, you can offer small, frequent feeds to keep them hydrated. Please consult a pediatrician for a safe treatment plan.