Consult a health care practitioner before use in the case of a cough that occurs with too much mucus or thick, greenish mucus, a persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, emphysema or shortness of breath. Stop use and ask a health care practitioner if cough lasts for more than 7 days, comes back, or is accompanied by fever, rash, or a persistent headache; if sore throat persists for more than 2 days or occurs with a fever, headache, rash, nausea or vomiting. These could be signs of a serious condition. If pregnant or breastfeeding, ask a health care practitioner before use. If fever or symptoms persist or worsen, consult a health care practitioner. Keep out of reach of children.