Helps restore mental alertness or wakefulness when experiencing fatigue or drowsiness.Recommended use Adults, age 18 and over. Oral dosage is 100 to 200 mg not more often than every 3-4 hours. Do not give to children under 18 years of age. Keep out of reach of children. The recommended dose of this product contains about as much caffeine as 1-2 cups of coffee. Limit the use of caffeine-containing medications, foods or beverages while taking this product. Too much caffeine may cause nervousness, irritability, sleeplessness and occasionally rapid heartbeat. Not intended for use as a substitute for sleep. If fatigue or drowsiness persists or continues to occur, consult a physician. Do not use if you are diabetic. If you are pregnant or nursing a baby, seek medical advise before using this product.