Instruct: Classify Amazon reviews into positive or negative sentiment
Query: FDA warns not to use in children under 2 years old

Since my baby is teething, the first thing that came to my mind is she needs baby orajel. However, I was reading online that the FDA issued a warning in 2011 that benzocaine can cause a baby to stop breathing. This is because it can cause increased concentrations of methemoglobinemia which is similar to hemoglobin except that it doesn't have the oxygen carrying capacity that hemoglobin has. Therefore, depriving your baby of oxygen. I used this for my son in 2009, and he was okay with it. However, because of the warning, I'm not risking it with my daughter.