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