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warnings
Warnings A persistent cough may be a sign of a serious condition. If cough persists for more than 1 week, tends to recur, or is accompanied by fever, rash, or persistent headache, consult a doctor. Do not use • for persistent or chronic cough such as occurs with smoking, asthma, or emphysema, unless directed by a doctor. • if cough is accompanied by excessive phlegm (mucus), unless directed by a doctor. If pregnant or breastfeeding , ask a health professional before use.