Do not use if you are now taking prescription monoamine oxidase inhibitor (maoi) (certain drugs for depression, psychiatric, or emotional conditions, or parkinson's disease), or for 2 weeks after stopping the maoi drug. If you do not know if your prescription drug contains and maoi, ask a doctor or a pharmacist before taking this products. Stop use and ask a doctor if cough lasts more than 7 days, comes back, or is accompanied by fever, rash, or persistent headache. These could be signs of a serious condition,. Ask a doctor before use if you - have cough that occurs with too much phlegm (mucus), have cough that lasts or is chronic such as occurs with smoking, asthma, chronic bronchitis, or emphysema. If pregnant or breast feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a poison control center right away. Do not use if you are now taking prescription monoamine oxidase inhibitor (maoi) (certain drugs for depression, psychiatric, or emotional conditions, or parkinson's disease), or for 2 weeks after stopping the maoi drug. If you do not know if your prescription drug contains an maoi, ask a doctor or a pharmacist before taking this product. Ask a doctor before use if you have cough that occurs with too much phlegm (mucus) , have cough that lasts or is chronic such as occurs with smoking, asthma, chronic bronchitis, or emphysema. Stop use ask a doctor if cough lasts more than 7 days, comes back, or is accompanied by fever, rash, or presistent headache, these could be signs of a serious condition. If pregnant or breast feeding. Ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a poison control center right away.