Ask a doctor or pharmacist before use if you are taking sedatives or tranquilizers. Ask a doctor before use if you have heart disease high blood pressure thyroid disease diabetes trouble urinating due to an enlarged prostate gland glaucoma I cough that occurs with too much phlegm (mucus) a breathing problem such as emphysema or chronic bronchitis cough that lasts or is chronic such as occurs with smoking, asthma or emphysema. When using this product do not use more than directed may cause marked drowsiness avoid alcoholic beverages alcohol, sedatives, and tranquilizers may increase drowsiness I be careful when driving a motor vehicle or operating machinery excitability may occur, especially in children. Stop use and ask a doctor if you get nervous, dizzy, or sleepless symptoms do not get better within 7 days or are accompanied by fever I cough lasts for more than 7 days, comes back, or is accompanied by fever, rash, or persistent headache. A persistent cough may be a sign 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 (1-800-222-1222). 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. to make a child sleepy.