My 18-month-old baby has lost his voice and has a cough?

Yes, it is important to pay attention to any other symptoms your baby may be experiencing, such as a runny or stuffy nose. In addition to Tylenol, you can try using a saline solution for nasal hygiene, which can help reduce nasal secretions and alleviate coughing. Make sure to encourage your baby to drink plenty of fluids and seek medical attention if the fever persists for 3 days or if symptoms remain the same after 7 days. It's always best to consult a doctor if you have any concerns about your baby's health.