No-Doz Awakeners* aid in maintaining alertness and full wakefulness. Meanwhile, No-Doz Plus** is designed to alleviate mental fatigue, drowsiness, and overall inertia, ensuring a state of brightness and alertness. Each No-Doz Awakeners tablet contains 100mg of caffeine, equivalent to roughly the caffeine content of a cup of coffee. In contrast, No-Doz Plus tablets contain 100mg of caffeine along with 10mg of Thiamine (Vitamin B1) and 10mg of Nicotinic Acid (Vitamin B3).