Consult a doctor or pharmacist before use if you have liver or kidney disease, or if you are pregnant or breastfeeding. When using this product, drowsiness may occur; do not drive or operate machinery. Avoid alcoholic drinks or any sedating substances. Possible side effects include headache, sleepiness, and dry mouth. Discontinue use and consult a doctor if an allergic reaction occurs, symptoms persist or worsen, or new symptoms appear. Keep out of reach of children. In case of overdose, call a Poison Control Center or seek medical help immediately.