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Why does caffeine make me dizzy: Why Does Coffee Make Some People Feel Dizzy or Sick?

Why Does Coffee Make Some People Feel Dizzy or Sick?

Does your morning cup of coffee sometimes make you feel dizzy or nauseous? Does sipping on a cup of coffee cause lightheadedness?

If so, you’re not alone, there are a number of people who sometimes feel dizzy or sick after drinking coffee, and there is an explanation.

While we all metabolize and react to coffee differently, it’s probably one specific compound within the coffee that is leading to these sudden dizzy spells. It probably won’t come as a surprise to most people, but the caffeine content in your daily cup of coffee could be the reason you don’t feel well after drinking it.

Yes, there are many different compounds that make up your cup of coffee, but caffeine sensitivity is typically what leads to the feeling of dizziness or nauseousness after drinking a cup. But why would you suddenly have a reaction to your cup of coffee now, when you’ve been totally fine drinking it for years?

Why Does Caffeine in Coffee Make Me Dizzy?

Caffeine intake may not always cause you to feel dizzy or uneasy, but under the right circumstances you could experience feelings you’ve never felt before.

Caffeine is a stimulant that makes your heart beat faster while also causing your blood pressure to rise. Because of this, if you consume too much caffeine, or there are other changes to your body occurring, you may experience some unwanted side effects.

Some of the symptoms you may start to notice if you develop a sensitivity to caffeine can include the following:

  • Dizziness
  • Headaches
  • Nausea
  • Rapid Heartbeat
  • Restlessness and Insomnia
  • Anxiety or General Uneasiness
  • Jitters
  • Diarrhea

These symptoms can happen after your first sip of coffee, or after years of daily drinking. Our bodies tend to change as we age, and certain factors may come into play as you get older that may not have affected you when you were younger.

Caffeine Sensitivity

The most common cause of dizziness when drinking coffee is related to caffeine sensitivity. This means that your body’s nervous system overreacts to the introduction of caffeine (a stimulant) as it is digested. This sensitivity can come from a number of things and not just genetics, although that is one of the causes.

Outside of a genetic predisposition to being sensitive to caffeine things like age and health conditions can play a major role.

If you already suffer from high blood pressure, anxiety, or reflux, then caffeine and coffee can exacerbate the symptoms associated with those issues and cause you to feel dizzy or lightheaded.

Certain medications that you are on, such as antibiotics, blood pressure medication, antidepressants, and others, can also interact with the caffeine and cause heightened side effects as well.

If you’ve noticed that you recently started experiencing dizziness after drinking coffee, then the first thing we would do is see if anything else in your life has changed. If you’ve started taking new medications or supplements, you can talk to your doctor about your caffeine intake to better determine if those might be causing some unwanted side effects.

Drinking Too Much Caffeine

In addition to caffeine sensitivity, there’s also a chance that you’re drinking more caffeine that normal and just don’t realize it.

Drinking excessive amounts of caffeine can also cause side effects that you may not have experienced before. So, take a second to think if you’ve consumed more coffee than you normally do in the span of a day or week to help determine if that could be causing you to become dizzy.

You could also be consuming caffeine from other sources in addition to your coffee and not even realize it. Some supplements have higher level of caffeine and when combined with coffee can make you feel sick.

Or maybe you haven’t drank a lot of coffee in a while and then decide one day to enjoy a large cup one morning. Your body may have lost its tolerance from the caffeine, which can also cause you to react differently than you normal might have while you were drinking it consistently.

Lifestyle Changes

Believe it or not, certain lifestyle changes could also be causing the caffeine and coffee to affect your body differently.

An influx of stress in itself can cause a feeling of uneasiness or jitters, and when combined with a stimulant like caffeine, it can enhance those effects and make you feel even worse.

The same goes with a lack of sleep. While caffeine is known to help people stay awake, it can also cause you to have disruptive sleep. Not getting a good night sleep, or being sleep deprived, can lead to dizziness, headaches, and lightheadedness on its own, so when you combine that with large amounts of caffeine, you may be making the issue worse.

Coffee and Your Health

While there are many health benefits that come from drinking coffee, caffeine doesn’t always agree with everyone.

As with all things, caffeine should be consumed in moderation. If you start to notice yourself feeling dizzy or lightheaded after drinking coffee, then you should take a look at your lifestyle and see if anything has changed recently. If you can’t easily find a reason as to why you may be reacting to caffeine all of a sudden, then it may be time to reach out to your doctor to get their opinion.

In some cases, switching to decaf coffee or limiting the amount of coffee you drink, will make the dizziness and nausea go away, but if it continues there may be something more serious going on that only your doctor would be able to help with.

Caffeine and coffee are a great way to get that extra pep in your step first thing in the morning, or during that after lunch lull, but your overall health is more important. Being aware of what caffeine can do to your body will help you be aware of any changes you may experience due to overconsumption or interaction with other medications or supplements.

Can Caffeine Cause Dizziness? 4 Tips to Avoid Side Effects – Performance Lab®

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Are you someone who reaches for caffeine the second you’re out of bed? It’s your lifeline for functioning like a human being day in and day out.

While caffeine offers many benefits for physical and mental performance, it could lead to some unwelcome side effects if it’s the first thing you’re consuming before water and food.

Dizziness is a common side effect of caffeine consumption on an empty stomach and in high doses, and if you’re not keen on seeing stars every time you pound back a cup of joe or a scoop or pre-workout, there are simple tweaks you can make to reduce caffeine’s side effects.

This article gives you an overview of why caffeine can cause dizziness, other effects you may experience, and our best tips to avoid any unpleasant side effects.

Side Effects of Caffeine Intake

Although even moderate caffeine intake can produce some nasty side effects for some people, the side effects become more pronounced as you close in on caffeine overdose territory. Caffeine overdose happens when you consume excessive amounts above the recommended intake level.

Excessive caffeine intake can lead to a state similar to intoxication, called caffeinism, characterized by restlessness, agitation, excitement, rambling thoughts and speech, and insomnia 1; it has deleterious effects on the nervous system, which can produce a variety of unpleasant symptoms ranging from depression and irritability to insomnia and loss of appetite.

Some of the most common symptoms of excessive caffeine intake include:

  • Dizziness
  • Increased thirst
  • Diarrhea
  • Insomnia
  • Headaches
  • Irritability

In more severe cases, symptoms of a caffeine overdose present as:

  • Difficulty breathing
  • Vomiting
  • Convulsion
  • Confusion
  • Hallucination
  • Chest pain
  • Rapid heartbeat
  • Uncontrollable muscle movements

Does Caffeine Cause Dizziness?

Caffeine is a stimulant that acts on the central nervous system to upregulate brain activity, increase alertness, and enhance cognitive function.

Its role as an adenosine antagonist is the mechanism behind many of its profound mental and anti-fatigue effects, but it’s also why it leads to more energy, better focus, increased alertness, and overall better performance.

Regarding performance, some research suggests that caffeine can also trigger the release of certain catecholamines, specifically epinephrine, that directly and indirectly improve exercise performance by inducing secondary metabolic changes 2, 3.

In moderate doses, caffeine can improve 4:

  • Alertness
  • Attention and focus
  • Concentration
  • Energy levels
  • Cognitive function
  • Reaction time
  • Productivity
  • Fatigue perceptions
  • Mood

However, many of these benefits are based on how your body reacts to caffeine. Because caffeine metabolism differs between individuals, some people can experience adverse reactions to low doses of caffeine, while others experience minimal, if any, reactions to high amounts of caffeine.

In either situation, caffeine is a neurostimulant that causes cerebral vasoconstriction by antagonizing adenosine receptors 5.

And although chronic caffeine use leads to adaptation of the vascular adenosine receptor system likely to compensate for the vasoconstrictive effects, reduced blood flow to the brain may be why some people feel dizzy after consuming caffeine.

A 2009 study looking at the effects of caffeine intake on cerebral blood flow found that caffeine reduced CBF by an average of 27% for people consuming high and moderate amounts 5.

However, those who consumed high amounts of caffeine showed a trend toward reduced cerebral blood flow compared to low and moderate consumers.

They concluded that while the cerebrovascular adenosine system can compensate for high caffeine intake, its ability to do so is minimal.

On the other hand, part of the dizziness response to caffeine could be because of caffeine’s effect on stimulating the nervous system, which increases heart rate, blood pressure, and the adrenal glands’ release of cortisol and adrenaline.

An influx of hormones can mimic the stress response, resulting in unpleasant side effects like dizziness, nausea, anxiety, and jitters.

Our Best 4 Tips To Avoid Caffeine Dizziness

  1. Winston, A. P., Hardwick, E., & Jaberi, N. Neuropsychiatric effects of caffeine. Advances in Psychiatric Treatment. 2005:11(6), 432-439.
  2. Graham TE. Caffeine and exercise: metabolism, endurance and performance. Sports Med. 2001;31(11):785-807.
  3. Anderson DE, Hickey MS. Effects of caffeine on the metabolic and catecholamine responses to exercise in 5 and 28 degrees C. Med Sci Sports Exerc. 1994;26(4):453-458.
  4. Lara B, Ruiz-Moreno C, Salinero JJ, Del Coso J. Time course of tolerance to the performance benefits of caffeine. PLoS One. 2019;14(1):e0210275.
  5. Addicott MA, Yang LL, Peiffer AM, et al. The effect of daily caffeine use on cerebral blood flow: How much caffeine can we tolerate?. Hum Brain Mapp. 2009;30(10):3102-3114.

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How does coffee affect blood vessels and the brain?


“It is worth tasting coffee, everything seems to flash, and thoughts crowd like battalions on the battlefield” – the words of Honore de Balzac, a well-known connoisseur of the drink. It is said that his daily dose reached 50 cups of strong coffee. Throughout the history of this drink, the impression has been that it goes hand in hand with the muse of many geniuses. Is this due to the effect of caffeine on mental activity? And how does coffee affect the vessels of the brain?


Let’s answer the question right away – there is no connection. But there is a direct impact on performance. This is because caffeine stimulates the heart rate, which means it increases blood supply, including to the brain.

After drinking a cup, the majority notes not only an increase in concentration, but also the speed of simple physical actions. For this reason, many gym goers drink a cup of espresso or americano an hour before their workout. Physical activity is easier, movements become clearer, and there is enough energy until the end of the session.

But the speed of work and quality are two different things, so it’s not worth looking for the relationship between genius and love for coffee.


A frequent question for those who think about their health. Caffeine is known to constrict blood vessels in the brain. This explains the effect of the “pills”, when after strong coffee the headache becomes less or completely disappears. At the same time, the vessels of the peripheral system expand under the influence of caffeine. Hence, for some time, hypotension increases blood pressure.

Any food and drinks have a similar effect on blood vessels – the body produces adrenaline, blood and oxygen enter the tissues faster. Therefore, for a healthy person, moderate consumption of a fragrant drink gives only a positive effect.

The health benefits of coffee are still not fully understood. For example, scientists are now studying the link between coffee consumption and a reduced risk of Alzheimer’s and Parkinson’s disease.


Here are some simple rules, following which you can enjoy great taste without harm to your health:

  • Drink coffee in small portions. A small cup of strong espresso is enough to recharge your performance batteries.
  • do not exceed 3-5 coffees per day. They contain approximately 400 mg. caffeine is the recommended daily allowance for this substance for an adult.
  • choose only quality coffee, instant or in beans. This directly affects the taste, benefits and your enjoyment of the drink. can be sure of the quality of the purchased product for coffee machines. All stages of production comply with international standards, and only selected coffee beans serve as raw materials.

NESCAFÉ® Alegria customers can be confident in the quality of their coffee machine product. All stages of production comply with international standards, and only selected coffee beans serve as raw materials.

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Experts named three reasons why you feel dizzy after coffee – Gazeta.Ru

Experts called three reasons why after coffee dizzy – Gazeta.Ru | News

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Many people start their day with a cup of coffee, which can invigorate and improve mood, however, some may feel dizzy after drinking the drink. About what this may be connected with, “Public News Service” found out from experts.

Thus, experts note that poor health can be caused by an overdose of coffee. If too much caffeine enters the body, the brain can desensitize receptors that stop transmitting signals to other organs in order to avoid overstraining the cardiovascular system. Another reason that can cause dizziness is the sensitivity of the body if the symptom occurs after one cup of coffee. This is usually characteristic of hypertensive patients and people with weak blood vessels.

In addition, dizziness can be due to hormonal causes, and this often happens in adolescents. In this case, experts advise them to give up the drink.

At the end of June, scientists from Jiao Tong University in Xi’an found out that in the presence of hypertension and other diseases, drinking coffee increases the risk of calcium deposits on the walls of the abdominal aorta, and therefore the risk of stroke and heart attack.

Previously, scientists from the University of Haume I disproved the myth about caffeine.

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