Ask a doctor before use if you have a cough that occurs with too much phlegm (mucus) a persistent or chronic cough that lasts such as occurs with smoking, asthma, or emphysema. Stop use and ask a doctor if cough lasts more than 7 days, comes back, or occurs with fever, rash, or headache that lasts. These could be signs of a serious condition. sore throat is severe, lasts more than 2 days, is accompanied or followed by fever, headache, rash, swelling, nausea, or vomiting. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. When using this product do not use more than directed. warnings Sore throat warning: Severe or persistent sore throat or sore throat that occurs with high fever, headache, nausea, and vomiting may be serious. Ask a doctor right away. Do not use more than 2 days or give to children under 2 years of age unless directed by a doctor.