Do not give to children under 12 years of age unless directed by a doctor. Ask a doctor before use if you have a breathing problem such as emphysema or chronic bronchitis, glaucoma, trouble urinating due to an enlarged 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 drinks, alcohol, sedatives, and tranquilizers may increase drowsiness, be careful when driving a motor vehicle or operating machinery.. If pregnant or breast-feeding, ask a doctor before use. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center (1-800-222-1222) right away. Tamer Evident: Do not use if outer carton is open.