For a 4-month-old baby, it is very important to be cautious with medications like Ventisol Junior Syrup, which contains Ambroxol, Guaiphenesin, and Terbutaline. These medicines are generally not recommended for infants under 6 months without strict medical supervision.

• Ambroxol helps thin and loosen mucus but requires careful dosing in very young infants.
• Guaiphenesin is an expectorant, and its safety in children under 2 years is not well established.
• Terbutaline is a bronchodilator that can cause significant side effects in young babies.

Because of these concerns, do not give this syrup to a 4-month-old without direct advice and prescription from a pediatrician. If your baby has respiratory symptoms, please consult a pediatrician promptly to get a safe and appropriate treatment plan tailored to your baby's age and condition.