Vivarin Brand Alertness Aid provides 200 mg caffeine per caplet to support mental alertness. Each caplet equals about a cup of coffee. This pack includes 40 tablets in a 4-pack. Directions: Adults and children 12 years of age and older take 1 caplet every 3–4 hours as needed. Store at room temperature and avoid excessive heat or humidity. For occasional use only; do not use in children under 12. Limit caffeine from other medications, foods, or beverages while using this product. Seek medical advice if fatigue persists or you are pregnant or nursing. Keep out of reach of children. In case of overdose, seek medical help or contact Poison Control.