Excessive caffeine ingestion leads to symptoms that overlap with those of many psychiatric disorders. In psychiatric in-patients, caffeine has been found to increase anxiety, hostility and psychotic symptoms.

Neuropsychiatric effects of caffeine

‘… coffee sets the blood in motion and stimulates the muscles; it accelerates the digestive processes, chases away sleep, and gives us the capacity to engage a little longer in the exercise of our intellects.’

Traité des Excitants Modernes(1838), (translated from the French by Robert Onopa)

Caffeine is the most widely used psychoactive drug in the world. It is found in more than 60 known species of plants, and dietary sources include coffee, tea, cocoa beverages, chocolate and soft drinks. Coffee was consumed in Arabia in the 13th century and was introduced into Europe in the early 17th century. Tea was probably drunk in China before the birth of Christ and was brought to Europe in the 16th century. Most dietary caffeine is still co… Continue Reading (5 minute read)

5 thoughts on “Excessive caffeine ingestion leads to symptoms that overlap with those of many psychiatric disorders. In psychiatric in-patients, caffeine has been found to increase anxiety, hostility and psychotic symptoms.”

  1. a_pinch_of_sarcasm

    Just wait until caffeine withdrawal makes you psychotic.

  2. demerits780

    Explains why Emergency Medical Services is an absolute snake pit of personalities. Working with a bunch of 20 year olds with hormonal issues and adrenal fatigue, what could go wrong?

  3. _johnfromtheblock_

    _Reading this as I drink my daily morning Monster_

  4. KoshOne

    Does the article say what is considered excessive caffeine ingestion? I skimmed it looking for that, but didn’t see it.

  5. DPRODman11

    About a decade ago, there was a newly released preworkout called “Craze”. I started taking it in college for my workouts and suddenly started passing all my classes with much more ease while getting into fantastic athletic shape with no serious fatigue. I no longer felt the requirement of having to bury my head in my O-Chem textbooks all night when a hour or two was all I needed for my entire class load. It felt like I was constantly living as if I took the pill from “Limitless”. Then in 2013, it was banned from all stores due to it containing active chemicals similar to methamphetamine.

    So yeah…be careful what you’re consuming, folks!

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