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  2. Caffeine: How much is too much? - Mayo Clinic

    www.mayoclinic.org/.../nutrition-and-healthy-eating/in-depth/caffeine/art-20045678

    Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults. That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks. Keep in mind that the actual caffeine content in beverages varies widely, especially among energy drinks. Caffeine in powder or liquid form can ...

  3. Coffee and health: What does the research say? - Mayo Clinic

    www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert...

    Coffee may offer some protection against: Parkinson's disease. Type 2 diabetes. Liver disease, including liver cancer. Heart attack and stroke. Coffee still has potential risks, mostly due to its high caffeine content. For example, it can temporarily raise blood pressure.

  4. Caffeine content for coffee, tea, soda and more - Mayo Clinic

    www.mayoclinic.org/.../nutrition-and-healthy-eating/in-depth/caffeine/art-20049372

    Check the charts for an idea of the caffeine content in popular beverages. Drink sizes are in fluid ounces (oz.) and milliliters (mL). Caffeine is shown in milligrams (mg). Keep in mind that the actual caffeine content of a cup of coffee or tea can vary quite a bit. Factors such as processing and brewing time affect the caffeine level.

  5. Caffeine: How does it affect blood pressure? - Mayo Clinic

    www.mayoclinic.org/diseases-conditions/high-blood-pressure/expert-answers/...

    It's not clear why caffeine causes some people's blood pressure to briefly rise. Some researchers think that caffeine could block a hormone that helps keep the arteries widened. Others think that caffeine causes the adrenal glands to release more adrenaline, which causes blood pressure to go up. Stress also might play a role.

  6. Caffeine: Does it affect blood sugar? - Mayo Clinic

    www.mayoclinic.org/diseases-conditions/type-2-diabetes/expert-answers/blood...

    For most healthy adults, caffeine doesn't noticeably affect blood sugar. The medical term for blood sugar is glucose. Having up to 400 milligrams of caffeine a day seems to be safe for most people. In the U.S., one of the most common sources of caffeine is coffee. The average U.S. adult drinks about two 8-ounce (240-milliliter) cups of coffee a ...

  7. Caffeine (oral route) - Mayo Clinic

    www.mayoclinic.org/drugs-supplements/caffeine-oral-route/description/drg-20137844

    Description. Caffeine tablets are used as an alertness aid to help you keep awake when you experience drowsiness or unusual tiredness or weakness. Do not use this medicine as substitute for sleep. Caffeine oral solution is used to treat short-term apnea of prematurity when premature babies (infants between 28 and 32 weeks gestational age) stop ...

  8. Caffeine citrate (intravenous route) - Mayo Clinic

    www.mayoclinic.org/drugs-supplements/caffeine-citrate-intravenous-route/...

    Description. Caffeine citrate injection is used to treat short-term apnea of prematurity when premature babies (infants between 28 and 32 weeks gestational age) stop breathing. Apnea of prematurity is caused by the baby's breathing centers not being fully developed. This medicine is available with or without your doctor's prescription.

  9. Butalbital, acetaminophen, and caffeine (oral route)

    www.mayoclinic.org/drugs-supplements/butalbital-acetaminophen-and-caffeine...

    Butalbital, acetaminophen, and caffeine combination is used to relieve symptoms of tension (or muscle contraction) headaches. Butalbital belongs to the group of medicines called barbiturates. Barbiturates act in the central nervous system (CNS) to produce their effects. Acetaminophen is used to relieve pain and reduce fever in patients.

  10. Caffeine: Is it dehydrating or not? - Mayo Clinic

    www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert...

    Caffeine poisoning can happen with 1,200 milligrams of pure caffeine, according to the FDA. That is less than half a teaspoon of caffeine in powder form. Other, more-common issues people have reported after drinking caffeinated drinks are trouble sleeping, loose stools and upset stomach. Overall, water is probably your best bet to stay hydrated.

  11. Butalbital and acetaminophen combination (oral route)

    www.mayoclinic.org/drugs-supplements/butalbital-and-acetaminophen-combination...

    Butalbital and acetaminophen combination is a pain reliever and relaxant. It is used to treat tension headaches. Butalbital belongs to the group of medicines called barbiturates. Barbiturates act in the central nervous system (CNS) to produce their effects. When you take butalbital for a long time, your body may get used to it so that larger ...