Do not take this product for more than 10 days (for adults) or 5 days (for children). Consult a doctor promptly for any of the following: If symptoms do not improve or new symptoms appear. If fever lasts more than 3 days. If sore throat is severe, persists for more than 2 days, or is accompanied or followed by fever, headache, rash, nausea, or vomiting. If cough persists for more than 7 days (for adults) or 5 days (for children), tends to recur, or is accompanied by rash or persistent headache. A persistent cough may be a sign of a serious condition. Do not take this product for persistence or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema or if cough is accompanied by excessive phlegm (mucus) unless directed by a doctor. As with any drug, if you are pregnant or nursing a baby, seek the advice of a health professional before using this product.