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.
5 Symptoms of an Adrenaline Rush. An adrenaline rush is an extremely intense feeling. Adrenaline is a natural hormone that is produced by the body and secreted throughout the body when you undergo some type of traumatic experience. For instance, if you are attacked by a dog or you get into a fist fight, you will notice an energetic feeling that gives you the power and strength to either escape or to attack.