Chapter 11
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Chapter 11. Caffeine. Caffeine. Caffeine is the most frequently consumed stimulant in the world It is classified as a xanthine (methylxanthine) It is found in a number of beverages Also found in some OTC medicines

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Chapter 11

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Chapter 11

Chapter 11

Caffeine


Caffeine

Caffeine

  • Caffeine is the most frequently consumed stimulant in the world

    • It is classified as a xanthine (methylxanthine)

    • It is found in a number of beverages

    • Also found in some OTC medicines

  • In the U.S., the average daily intake of caffeine is equivalent to 2 cups of coffee a day.


Caffeine content of beverages and chocolate

BeverageCaffeine Content (mg)/cupAmount

Brewed coffee90-125 5 oz.

Instant coffee35-164 5 oz.

Decaffeinated coffee 1-6 5 oz.

Tea25-125 5 oz.

Cocoa 5-25 5 oz.

Coca-Cola 4512 oz.

Pepsi-Cola 3812 oz.

Mountain Dew 5412 oz.

Chocolate bar 1-35 1 oz.

Caffeine Content of Beverages and Chocolate


Coffee

Coffee

  • Goatherd to holy man

  • “The women’s petition against coffee”

  • Tax

  • Consumption increased during prohibition

  • Commercial roasting began in 1790

  • Starbucks


Chapter 11 2747051

Tea

  • 350 AD

  • English East India Company

  • Popular in new colonies

  • Boston Tea Party


Chocolate

Chocolate

  • Cocoa

  • 17th century spread to wealthy in Europe

  • Drinks and houses

  • Bars


Other sources of caffeine

Other Sources Of Caffeine

  • Soft drinks

  • Energy drinks

  • Over the counter pills

  • Other natural sources


Effects of xanthines

Effects of Xanthines

  • CNS effects

    • Enhances alertness, causes arousal, diminishes fatigue

  • Adverse CNS effects

    • Insomnia, increase in tension, anxiety, and initiation of muscle twitches

    • Over 500 milligrams - panic sensations, chills, nausea, clumsiness

    • Extreme high doses (5 to 10 grams) - seizures, respiratory failure, and death


Effects of xanthines1

Effects of Xanthines

  • Cardiovascular effects

    • Low doses - heart activity increases, decreases, or do nothing

    • High doses - rate of contraction of the heart increases, minor vasodilation in most of the body, cerebral blood vessels are vasoconstricted

    • Respiratory system effect

    • Can cause air passages to open and facilitate breathing


Caffeine1

Caffeine

  • Caffeine Intoxication

    • Caffeinism: restlessness, nervousness, excitement, insomnia, flushed face, diuresis, muscle twitching, rambling thoughts and speech, stomach complaints

    • some research shows a relationship with:

      • cancers of the bladder, ovaries, colon, and kidneys

      • mammilary cysts

  • Caffeine Dependence


Otc drugs containing caffeine

OTC Drugs Containing Caffeine

  • Analgesics

  • Stay awake products

  • Picker-uppers

  • Herbal Stimulants

    • Ephedrine


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