1 / 11

Chapter 11

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

robyn
Download Presentation

Chapter 11

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 11 Caffeine

  2. 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.

  3. 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

  4. Coffee • Goatherd to holy man • “The women’s petition against coffee” • Tax • Consumption increased during prohibition • Commercial roasting began in 1790 • Starbucks

  5. Tea • 350 AD • English East India Company • Popular in new colonies • Boston Tea Party

  6. Chocolate • Cocoa • 17th century spread to wealthy in Europe • Drinks and houses • Bars

  7. Other Sources Of Caffeine • Soft drinks • Energy drinks • Over the counter pills • Other natural sources

  8. 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

  9. 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

  10. 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

  11. OTC Drugs Containing Caffeine • Analgesics • Stay awake products • Picker-uppers • Herbal Stimulants • Ephedrine

More Related