Ask a doctor before use if you have a persistent or chronic cough that lasts, is chronic such as occurs with smoking, asthma, chronic bronchitis, or emphysema or is accompanied by excessive phlegm (mucus). Stop use and ask a doctor if cough lasts more than 7 days, comes back, or occurs with fever, rash, or persistent headache. These could be signs of a serious illness. If pregnant or breastfeeding ask a health care professional before use. Keep out of reach of children. In case of accidental overdose, seek professional assistance or contact a Poison Control Center immediately.