Ask a doctor or pharmacist before use if you are taking sedatives or tranquilizers. Do not use - to make a child sleepy, with any other product containing diphenhydramine, even one used on skin. Ask a doctor before use if you have - glaucoma, trouble urinating due to an enlarged prostate gland, a breathing problem such as emphysema or chronic bronchitis. When using this product - marked drowsiness may occur, avoid alcoholic drinks, alcohol, sedatives, and tranquilizers may increase drowsiness, excitability may occur, especially in children, be careful when driving a motor vehicle or operating machinery. 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).