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  2. Effects of nicotine on human brain development - Wikipedia

    en.wikipedia.org/wiki/Effects_of_nicotine_on...

    Nicotine also stimulates nicotinic acetylcholine receptors in the adrenal medulla, resulting in increased levels of epinephrine and beta-endorphin. [10] Its physiological effects stem from the stimulation of nicotinic acetylcholine receptors, which are located throughout the central and peripheral nervous systems. [56]

  3. Stimulant - Wikipedia

    en.wikipedia.org/wiki/Stimulant

    Caffeine is a stimulant compound belonging to the xanthine class of chemicals naturally found in coffee, tea, and (to a lesser degree) cocoa or chocolate. It is included in many soft drinks, as well as a larger amount in energy drinks. Caffeine is the world's most widely used psychoactive drug and by far the most common stimulant.

  4. Management of attention deficit hyperactivity disorder

    en.wikipedia.org/wiki/Management_of_attention...

    CaffeineADHD is associated with increased caffeine consumption, and caffeine's stimulant effects on cognition may have some benefits for ADHD. [251] Limited evidence suggests a small therapeutic effect that is markedly inferior to standard treatments like methylphenidate and dextroamphetamine while still producing similar or greater side ...

  5. Nootropic - Wikipedia

    en.wikipedia.org/wiki/Nootropic

    In 2008, stimulants, such as caffeine, were the most commonly used nootropic agent. [15] In 2016, the American Medical Association adopted a policy to discourage prescriptions of nootropics for healthy people, on the basis that the cognitive effects appear to be highly variable among individuals, are dose-dependent, and limited or modest at ...

  6. Nicotine - Wikipedia

    en.wikipedia.org/wiki/Nicotine

    Mild nicotine withdrawal symptoms are measurable in unrestricted smokers, who experience normal moods only as their blood nicotine levels peak, with each cigarette. [35] On quitting, withdrawal symptoms worsen sharply, then gradually improve to a normal state. [35] Nicotine use as a tool for quitting smoking has a good safety history. [36]

  7. Rising caffeine levels spark calls for ban on energy drink ...

    www.aol.com/news/rising-caffeine-levels-spark...

    Pediatricians and parents are calling for the U.S. to treat new high-caffeine energy drinks like alcohol and cigarettes and ban their sale to minors as a single serving can contain as much ...

  8. Psychoactive drug - Wikipedia

    en.wikipedia.org/wiki/Psychoactive_drug

    They can enhance alertness, attention, cognition, mood and physical performance. Some stimulants are used medicinally to treat individuals with ADHD and narcolepsy. Examples: amphetamines, caffeine, cocaine, nicotine. Depressants reduce, or depress, activity and stimulation in the central nervous system.

  9. Caffeine dependence - Wikipedia

    en.wikipedia.org/wiki/Caffeine_dependence

    In the human body, caffeine blocks adenosine receptors A 1 and A 2A. [5] Adenosine is a by-product of cellular activity: the stimulation of adenosine receptors produces sedation and a desire for sleep. Caffeine's ability to block these receptors means the levels of the body's natural stimulants, dopamine and norepinephrine, continue at higher ...