Caffeine Effects: Withdrawal, Sleep & Health Impact

Caffeine impacts everything from sleep quality to concentration and heart rate. Learn how long withdrawal takes, the diuretic effects on the body, and the potential risks of taking caffeine tablets with medication or alcohol.

Young woman sitting outside cafe drinking coffee

Can Coffee Cause Bloody or Black Stools?

A cup of coffee can get your body's motor running to start the day or provide a boost when you're sitting through a dull, afternoon meeting at work. In addition to helping you feel mentally alert, coffee can affect the other end of your body.

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Do Apples Give You More Energy Than Coffee?

When you wake up feeling groggy in the morning, should you reach for an apple or a hot cup of Joe? That answer depends on the kind of pick-me-up you need. Everyone knows the expression, “comparing apples to oranges,” but at least those are both fruits.

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Excessive Caffeine & Hypothyroidism

Caffeine is a readily available stimulant. Many people rely on the morning dose of caffeine from a cup of coffee or tea, and others use soft drinks or energy drinks to keep them going throughout the day.

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Coffee cup and plunger on table

Levothyroxine & Caffeine

Levothyroxine is one of the most commonly prescribed thyroid medications, used to replace or supplement the hormones a healthy thyroid naturally produces. Caffeine is a widely available substance found in coffee, tea, soft drinks and chocolate.

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glass with coke

Caffeine & Eye Twitching

An eyelid twitch usually appears suddenly and seemingly out of nowhere. Though it can sometimes be related to a serious medical problem, lid twitching is usually a benign condition.

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What Causes a Person to Crash After Drinking Caffeine?

If you've ever reached for a cup of coffee to give yourself a boost during a mid-afternoon slump or downed a double cappuccino to stay up late studying, you know the energizing effects of caffeine. But you may also have noticed that those energizing effects don't last forever; later on, you're likely to experience a "

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Child in trouble.

Caffeine & Autism

Autism is a term used to describe a group of developmental problems. Autism Speaks reports that about one in every 110 kids is diagnosed with a disorder on the autism spectrum – a number that could be increasing by up to 17 percent annually.

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close-up of a teenage girl drinking cola with a straw

Caffeine and Throat Tightness

Throat tightness is an alarming symptom after consuming caffeine that may warrant medical attention. Caffeine is a stimulant drug that can affect various parts of your body. The substance is found naturally in tea, coffee and chocolate and may be added to soda beverages and athletic drinks.

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Coffee and Coffee Beans

Caffeine and Warfarin

Approximately 80 percent of adults have caffeine every day, according to the U.S. Food and Drug Administration. While many people consume caffeine for its positive effects, adverse reactions can occur. Caffeine has the potential to interact negatively with certain supplements and medications.

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Mug in coffee shop, New York, USA

Tachycardia & Caffeine

Coffee, tea, soft drinks, chocolate and some medications contain varying amounts of caffeine. While a small amount of this chemical increases your alertness with few noticeable side effects, even a little too much can cause discomfort.

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Pour Over Coffee

Caffeine & Taurine

Caffeine and taurine are two popular ingredients used in energy drinks which are growing in popularity in the United States, particularly among college students and adolescents.

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coffee love

Caffeine's Effect on Platelets

According to CBS News, caffeine is America’s fuel. More than 50 percent of Americans drink three to four cups of coffee a day, which works out to more than 330 million cups. But that’s just coffee.

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Does Caffeine Cause Blurred Vision?

Many foods and beverages -- including coffee, tea and chocolate --contain caffeine. Although caffeine will not likely cause serious health complications, its use may cause symptoms such as increased heart rate, shaky hands and anxiety.

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Caffeine and Stomach Gas

Although stomach gas from caffeine consumption is not common, it can occur. This is particularly true if you consume large quantities of caffeine.

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Coffee and straight chocolate

The Disadvantages of Caffeine

Caffeine is a bitter substance that stimulates your central nervous system. This means it can help boost your alertness and eliminate your drowsiness, according to MedlinePlus.com. Chances are you consume some caffeine on a regular basis if you drink coffee or tea, drink soda or eat chocolate.

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Hydrocodone Used with Caffeine

Hydrocodone is an opiate medication prescribed for the treatment of moderate to severe pain. It is only available in combination with other ingredients, such as acetaminophen, ibuprofen, expectorants and caffeine. Hydrocodone formulations containing caffeine are approved by the U.S.

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Pretty woman drinking coffee

Can Caffeine Kick You Out of Ketosis?

Low-carb dieters who consume very few carbohydrates often go into ketosis. Ketosis develops when you use up your glycogen stores and need an alternate source of energy. Your body forms ketone bodies as it breaks down fat to use for energy, and you excrete ketones in the urine.

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angelica sinensis herb on white background

Ginseng & Caffeine

Caffeine and ginseng extract are two ingredients that commonly appear in energy drinks. While both compounds have been linked to increased sensations of alertness and mental acuity, the manner in which each one affects the body is considerably different.

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