Do not use if you are now taking a 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 pharmacist before taking this product. Ask a doctor before use if you have heart disease, high blood pressure, thyroid disease, diabetes, trouble urinating due to enlarged prostate gland, cough that occurs with too much phlegm (mucus), persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis or emphysema. When using this product, do not use more than directed. Stop use and ask a doctor if you get nervous, dizzy or sleepless. Symptoms do not improve within 7 days or occur with a fever. Cough persists for more than 7 days, comes back or occurs with a fever, rash or persistent 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.