Do not use - in children under 12 years of age, as a substitute for sleep. For occasional use only. Stop use and ask a doctor if fatigue or drowsiness persists or continues to recur. Keep out of reach of children. In case of overdose, get medical help or contact a poison control center right away. If pregnant or breast-feeding, ask a health professional before use. When using this product limit the use of caffeine-containing medications, foods, or beverages because too much caffeine may cause nervousness, irritability, sleeplessness, and, occasionally, rapid heartbeat. The recommended dose of this product contains about as much caffeine as a cup of coffee.