Caffeine is the most commonly used psychoactive substance worldwide. It can be found in various foods and medicines. It may increase health risks in different organ systems, thus, it is important to assess caffeine intake regularly.
Acute Effects of Caffeine
- Increased alertness and concentration
- Increased gastric acid secretion
- Diuresis
- Bronchodilation
- Lower seizure threshold
- Anxiety, agitation
Caffeine Intoxication
Caffeine intoxication is the ingestion of at least 250 mg caffeine. It can also refer to clinically significant impairment or distress.
Signs of Caffeine Intoxication:
- Excitement
- Restlessness
- Insomnia
- Nervousness
- Inexhaustibility
- Flushed face
- Rambling speech
- Muscle twitching
- Diuresis
- Psychomotor agitation
- GI disturbance
- Tachycardia or arrhythmia
Caffeine Content in Foods
Average
| |||
Tea and Coffee
Beverage
|
Caffeine Level
(mg/5 oz. cup)
|
Carbonated
Beverages
|
Caffeine Content
(mg/12 fl. oz.)
|
Instant
Coffee
|
40 – 110
|
Coca Cola
|
61
|
Percolated
Coffee
|
65 – 125
|
Sprite
|
0
|
Decaffeinated
Coffee
|
2 – 8
|
Mountain
Dew
|
51
|
Black,
bagged tea
|
25 – 50
|
Diet Coke
|
46
|
Leaf tea
|
30 – 50
|
7-Up
|
0
|
Instant tea
|
25 – 30
|
Pepsi Cola
|
41
|
Diet-Pepsi
Cola
|
34
| ||
Baking Chocolate,
(unsweetened)
|
25
| ||
Chocolate Milk
|
15
| ||
Cocoa
|
(mg/1 oz)
| ||
References:
Healing Wonders of Diet Effective Guide to Diet Therapy p.239 © 2003 Philippine Publishing House ISBN 971-581-013-6
http://www.psychiatry.emory.edu/M2Studentspdfs/Drexler_Lecture_2005_SUDs_I_Nicotine_and_Caffeine.pdf Nicotine and Caffeine by Karen Drexler, M.D. Retrieved on May 5, 2011
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