Ask a doctor or pharmacist before use if you are taking sedatives or tranquilizers . 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. When using this product do not use more than directed excitability may occur, especially in children, marked drowsiness may occur, avoid alcoholic drinks be careful when driving a motor vehicle or operating machinery, alcohol, sedatives, and tranquilizers may increase drowsiness . Ask a doctor before use if you have heart disease, thyroid disease, high blood pressure, diabetes, glaucoma, cough that occurs with too much phlegm (mucus), a breathing problem or chronic cough that lasts or as occurs with smoking, asthma, chronic bronchitis, or emphysema, trouble urinating due to enlarged prostate gland, a sodium-restricted diet . 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.