Sore throat warnings: 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. These may be serious. Do not use in children under 6 years of age unless directed by a doctor. Stop use and ask a doctor if: cough persists for more than 1 week, tends to recur, or is accompanied by fever, rash, or persistent headache. These could be signs of a serious condition, sore mouth does not improve in 7 days, irritation, pain, or redness persists or worsens, keep our of reach of children. Ask a doctor before use if you have: persistent or chronic cough such as occurs with smoking, asthma, or emphysema, cough accompanied bu excessive phlegm (mucus). Ask a doctor before use if you have: persistent or chronic cough such as occurs with smoking, asthma, or emphysema, cough accompanied by excessive phlegm (mucus).