Otrivin Advance Adult Nasal Spray is not safe for a 20-day-old baby. It contains xylometazoline, a nasal decongestant that is generally not recommended for infants under 6 years old due to risks like breathing difficulties or heart rate changes.

Key points to remember:

• This spray is unsuitable for newborns and very young infants.
• Always consult a pediatrician before giving any medication to a baby.
• Safer options for nasal congestion in infants include saline nasal drops or gentle suctioning as advised by a pediatrician.

If your baby has nasal congestion, please see a pediatrician promptly to ensure safe and appropriate care.