For your protection, this bottle has a cap with a perforated ring attached. Do not use if the ring is broken or missing. 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 this product for persistent or chronic cough such as occurs with smoking, asthma, emphysema, or if cough is accompanied by excessive phlegm (mucus) consult 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. Keep out of the reach of children.