Ask a doctor before use if you have a breathing problem such as asthma, emphysema or chronic bronchitis difficulty in urination due to enlargement of the prostate gland glaucoma. When using this product avoid alcoholic beverages take only at bedtime. Do not use in children under 12 years of age. ask a doctor or pharmacist before use if you are taking any other drugs. 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. Stop use and ask a doctor if sleeplessness persists continuously for more than two weeks. Insomnia may be a symptom of a serious underlying medical illness.