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. If sore mouth symptoms do not improve in 7 days, see your dentist or doctor promptly. These symptoms may be serious. 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). If pregnant or breast-feeding, ask a health professional before use. Keep out of each of children. Stop use and ask doctor if cough persists for more than 7 days, tends to recur, or is accompanied by fever, rash, or persistent headache. these could be signs of a serious condition. sore throat is severe, or irritation, pain or redness lasts or worsens sore mouth does not improve in 7 days.