In Each Lozenge Warnings: Use of this product may cause methemoglobinemia, a serious condition that must be treated promptly because it reduces the amount of oxygen carried in blood. This can occur even if you have used this product before. Stop use and seek immediate medical attention if you or a child in your care develops:: pale, gray, or blue colored skin (cyanosis); headache ; rapid heart rate; shortness of breath; dizziness or lightheadedness; fatigue or lack of energy. Sore throat warning: If sore throat is severe, persists for more than 2 days, is accompanied or followed by fever, headache, rash, swelling, nausea, or vomiting, consult a doctor promptly. If sore mouth symptoms do not improve in 7 days, or if irritation, pain, or redness persist or worsens, see your dentist or doctor promptly. Allergy alert: Do not use this product if you have a history of allergy to local anesthetics such as procaine, butacaine, benzocaine, or other caine anesthetics. Do not use: for teething; in children under 2 years of age. Stop use and ask a doctor if: sore throat is severe or irritation, pain or redness persists or worsens; sore mouth symptoms do not improve in 7 days If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact Poison Control Center right away. Tamper-Evident packaging. Do not use if outer box or blister is open or damaged.