Ask a doctor or pharmacist before use if you are taking sedatives or tranquilizers. Ask a doctor before use if you have trouble urinating due to an enlarged prostate gland glaucoma a breathing problem such as emphysema or chronic bronchitis. Warnings Do not use to make a child sleepy with any other product containing diphenhydramine, even one used on skin. When using this product alcohol, sedatives, and tranquilizers may increase drowsiness marked drowsiness may occur be careful when driving a motor vehicle or operating machinery avoid alcoholic drinks 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 (1-800-222-1222).