Health Centers
if not loaded., try Site map to view all
bookmark | print this page | mail to friend | site map | help

Effects of Addictive Substances



Caffeine Effects


The chemical name of caffeine is 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6,-dione OR 1,3,7-trimethylxanthine and is the most popular drug throught the world.

You can call it 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6,-dione OR 1,3,7-trimethylxanthine, but what we are really talking about is caffeine. Caffeine may be the most popular drug in the world. We consume caffeine in coffee, tea, cocoa, chocolate, some soft drinks, and some drugs. The actual source of caffeine is the coffee bean, tea leaf, kola nut and cacao pod. Pure caffeine is odorless and has a bitter taste.

Effects on nervous system :

Caffeine is a central nervous system stimulant.
In moderate doses, caffeine can:
* increase alertness
* reduce fine motor coordination
* cause insomnia
* cause headaches, nervousness and dizziness

In massive doses, caffeine is lethal. A fatal dose of caffeine has been calculated to be more than 10 grams (about 170 mg/kg body weight) - this is the same as drinking 80 to 100 cups of coffee in rapid succession - not an easy thing to do.

Caffeine enters the bloodstream through the stomach and small intestine and can have its effects as soon as 15 minutes after it is consumed. Once in the body, caffeine will stay around for hours: it takes about 6 hours for one half of the caffeine to be eliminated.

Caffeine belongs to the xanthine chemical group. Adenosine is a naturally occurring xanthine in the brain that is used as a neurotransmitter at some synapses. One effect of caffeine is to interfere with adenosine at multiple sites in the brain including the reticular formation. Caffeine also acts at other sites in the body to increase heart rate, constrict blood vessels, relax air passages to improve breathing and allow some muscles to contract more easily.

Some studies show that caffeine causes physical dependence. One way to tell if someone "needs" that cup of coffee or bottle of Coke is to take it away from them and then see if they have any withdrawal symptoms. Typical withdrawal symptoms associated with caffeine are headache, fatigue and muscle pain. These symptoms can occur within 24 hours after the last dose of caffeine. One study has stated that the minimum consumption of caffeine for physical dependence is 4 cups of coffee per day. Other studies say that a few more cups of coffee are needed to develop dependence.

Caffeine can be found in many drinks, food and drugs. The following items all contain various amounts of caffeine:


Item Item Size Caffeine Content (mg)
Coffee 150 ml (5 oz) 60-150
Coffee, decaf 150 ml (5 oz) 2-5
Tea 150 ml (5 oz) 40-80
Hot Cocoa 150 ml (5 oz) 1-8
Chocolate Milk 225 ml 2-7
Jolt Cola 12 oz 100
Josta 12 oz 58
Mountain Dew 12 oz 55
Surge 12 oz 51
Tab 12 oz 47
Diet Coca Cola 12 oz 45
Coca Cola 12 oz 64
Coca Cola Classic 12 oz 23
Tab 12 oz 46
Pepsi Cola 12 oz 43
Cherry Coca-Cola 8 oz 23
7-Up 12 oz 0
Mug Root Beer 12 oz 0
Sprite 12 oz 0


Item Item Size Caffeine Content (mg)
Ben/Jerry No Fat Coffee Fudge Froz. Yog. 1 cup 85
Starbucks Coffee Ice Cream 1 cup 40-60
Dannon Coffee Yogurt 8 oz. 45
Chocolate Bar 50 g 3-63
Chunky Bar 1 bar (40 g) 11.6
100 Grand Bar 1 bar (43 g) 11.2
Nestle Crunch Bar 1 bar (40 g) 10
Krackel Bar 1 bar (47 g) 8.5
Peanut Butter Cup 1 pk (51 g) 5.6
Kit Kat Bar 1 bar (46 g) 5
Mr. Goodbar 1 bar (50 g) 5
Raisinets 10 pieces (10 g) 2.5
Butterfinger Bar 1 bar (61 g) 2.4
Baby Ruth Bar 1 bar (60 g) 2.4
Special Dark Sweet Chocolate Bar 1 bar(41 g) 31
Chocolate Brownie 1.25 oz 8
Chocolate Chip Cookie 30 g 3-5
Chocolate Ice Cream 50 g 2-5
Milk Chocolate 1 oz 1-15
Bittersweet Chocolate 1 oz 5-35
Butterfinger Bar 1 bar (2.16 oz) 2
After Eight Mint 2 pc (8 g) 1.6

Non-prescription Drugs :

Item (1 tablet or capsule) Caffeine Content(mg)
Dextrim 200
Vivarin 200
No Doz 100
Excedrin 65
Vanquish 33
Anacin 32
Midol 32
Triaminicin 30
Dristan 16


Your feedback?


Rate this page?
Good Average Poor

Rating accepted

Thanks for your note! Suggestion if any, will be taken up by the editor squad on a prority. We appreciate your gesture.
Hecapedia squad
Improve hecapedia - Join the squad

Nothing on this web site, in any way to be viewed as medical advice. All contents should be viewed as general information only.
All health care decisions should only be made with consultation from your physician.

About us | Link to us | Contact us | Associates | Media Center | Business services | Feedback | Report Bugs | Sitemap | Help
privacy policy | disclaimer | terms and conditions | accessibility | anti-spam policy
© 2006 hecapedia