A persistent cough may be a sign of a serious condition. In case of emergency or accidental overdose, contact a medical professional or Poison Control Center immediately. Hyland's may also be contacted for emergency information about our products 24 hours a day, 7 days per week at (800) 624-9659. Keep this and all medications out of the reach of children. Sore throat warning: Severe or persistent sore throat or sore throat accompanied by high fever, headache, nausea and vomiting may be serious. Consult a doctor promptly. As with any drug, ask a doctor before use if pregnant or breast-feeding. Consult a physician if: symptoms persist for more than 7 days or worsen. inflammation, fever or infection develops. symptoms are accompanied by a high fever (over 101°F). cough tends to recur or is accompanied by a high fever, rash or persistent headache. Do not use this product for persistent or chronic cough such as asthma, smoking or emphysema or if cough is accompanied by excessive mucus, unless directed by a licensed medical professional.