The drugs are normally prescribed to treat attention deficit hyperactivity disorder (ADHD), but healthy students use them to get a leg up in school, by improving focus, concentration and memory.
Adrenaline, or epinephrine, is a hormone that dilates an individual's air passages and increases his heart rate when he is faced with a stressful situation. The hormone is secreted from the adrenal glands to help ensure survival under dangerous situations.
In fact, stress can help you accomplish tasks more efficiently. It can even boost memory. Stress is also a vital warning system, producing the fight-or-flight response. When the brain perceives some kind of stress, it starts flooding the body with chemicals like epinephrine, norepinephrine and cortisol. More angry or anxious than usual. What You Can Do. Stress is an inevitable part of life, but you can improve the way you respond to stress and avoid or change some of the situations that create negative stress.