When using this product do not exceed recommended dosage excitability may occur, especially in children (Nighttime only) marked drowsiness may occur (Nighttime only) alcohol, sedatives, and tranquilizers may increase drowsiness (Nighttime only) avoid alcoholic beverages (Nighttime only) use caution when driving a motor vehicle or operating machinery (Nighttime only). Stop use and ask a doctor if symptoms do not improve within 7 days or occur with fever nervousness, dizziness, or sleeplessness occur. Do not use if you are now taking a prescription monoamine oxidase inhibitor (MAOI) (certain drugs for depression, psychiatric or emotional conditions, or Parkinson's disease), or for 2 weeks after stopping the MAOI drug. If you do not know if your prescription drug contains an MAOI, ask a doctor or pharmacist before taking this product. with any other product containing diphenhydramine, even one used on skin (Nighttime only). 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 (1-800-222-1222) right away. If taking NIGHTTIME and DAYTIME products, carefully read each section to ensure correct dosing. Do not take DAY & NIGHT at the same time. Ask a doctor or pharmacist before use if you are taking sedatives or tranquilizers. (Nighttime only). Ask a doctor before use if you have heart disease diabetes thyroid disease high blood pressure difficulty in urination due to enlargement of the prostate gland a breathing problem such as emphysema or chronic bronchitis (Nighttime only) glaucoma (Nighttime only).