Home › Health Topics › Drugs & Alcohol > 


coffee; drug; stimulant; cola; chocolate; caffeine; tea; pregnancy; decaffeinated; withdrawal; guarana; guaranine; energy;

Caffeine is the most popular and widely used drug in the world. It is a substance found in the leaves, seeds or fruit of a number of plant species, such as coffee and tea plants.

Caffeine is a stimulant which acts on the central nervous system to speed up the messages to and from the brain. In small doses, it can make you feel refreshed and focused. In large doses, you are likely to feel anxious and have difficulty sleeping.

More information

Australian Drug Foundation – Druginfo

Better Health Channel

Resource in South Australia

Drug and Alcohol Services South Australia    

  • Alcohol and Drug Information Service (ADIS) 24 hour state-wide helpline in South Australia: 1300 131 340


  • Guarana is a plant growing in South America (especially Brazil). Guarana contains guaranine which is the same as caffeine.  
  • Drinks containing guarana often contain a lot of guaranine and the effects are the same as drinking a lot of caffeine.
back to top
The information on this site should not be used as an alternative to professional care. If you have a particular problem, see a doctor or other health professional.
Home › Health Topics › Drugs & Alcohol >