Keep out of reach of children. 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. 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). 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.