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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

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

Beverage Caffeine Content (mg)/cup Amount

Brewed coffee 90-125 5 oz.

Instant coffee 35-164 5 oz.

Decaffeinated coffee 1-6 5 oz.

Tea 25-125 5 oz.

Cocoa 5-25 5 oz.

Coca-Cola 45 12 oz.

Pepsi-Cola 38 12 oz.

Mountain Dew 54 12 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
slide5
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