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Caffeine Use


Caffeine is a stimulant that gives you a burst of energy and keeps you awake. Caffeine is added to drinks, supplements, medicines, and herbal products. Caffeine can raise your blood pressure and heart rate. It may cause you to feel jittery, anxious, or dizzy. It can also cause indigestion, headache, dehydration, and trouble sleeping.


Safe intake of caffeine:

A safe amount for healthy adults is less than 400 mg per day. Pregnant women should limit their caffeine intake to less than 200 mg per day. Certain people, such as children and older adults, are more sensitive to the effects of caffeine. Talk to your healthcare provider about the amount of caffeine that is safe for you.

Caffeine amounts in food and drinks:

  • 20 ounces of energy drinks: 50 mg to 500 mg
  • 8 ounces of coffee (brewed, drip): 137 mg
  • 8 ounces of instant coffee: 76 mg
  • 8 ounces of brewed tea: 48 mg
  • 12 ounces of caffeinated soda: 37 mg
  • 8 ounces of instant tea: 26 to 36 mg
  • 1.45 ounces of dark chocolate: 30 mg
  • 12 ounces of hot cocoa: 8 to 12 mg
  • 1.55 ounces of milk chocolate: 11 mg

Symptoms of caffeine withdrawal:

Caffeine withdrawal can occur if you drink more than 200 mg of caffeine each day for at least 2 weeks and then stop. It can occur within 24 hours of stopping or delaying your intake of caffeine. Symptoms of caffeine withdrawal may include headache, sleepiness, nausea, and muscle aches. You may also have trouble concentrating and feel irritable or depressed.

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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.