Can Caffeine Make You Sleepy? – Health Blog

A caffeine it is an active principle known mainly for awakening people, giving more energy and animosity to everyday life.

For this reason, it is so common to find people who claim that the day only really starts after a good cup of coffee.

However, some individuals feel the opposite effects after consuming coffee or any substance that has the substance.

I.e, there are people who feel sleepy when ingesting foods rich in caffeine. Why does it happen? Follow this article and learn more about it.

Reasons why caffeine makes some people sleepy

1- Biochemical Individuality

A biochemical individuality is nothing more than the variations existing between organisms after receiving a certain stimulus.

In this case, there are differences in the functioning of the organism, in the action of enzymes, in the production of hormones and even in metabolism.

Therefore, each human being has its own biochemical characteristics and not all are the same.

This is one of the explanations why many people feel sleepy after consuming caffeine and not the other way around, which happens to most people.

2- Accumulated Tiredness

Life habits give an idea of ​​how health is going and not everyone manages to balance behavior in a way that is considered healthy.

Logo, there are situations that make tiredness accumulate in the body to the point that not even energy substances can produce any effect.

Sleeping little, working a lot, high stress and a sedentary lifestyle leave the body more “tired” and the accumulation of tiredness can interrupt the action of caffeine.

The result is that even if you drink several cups of coffee, you can still feel sleepy, which gives the idea that caffeine has a sedative effect on your body.

3- Increased levels of adenosine

Adenosine is a enzyme responsible for signaling the brain that it is time to sleep. In this way, adenosine production intensifies during the day and the accumulation of the substance binds to brain receptors during the night, causing the feeling of sleep to reach us.

Caffeine can temporarily block the action of adenosinewhich is why we feel more energy after a cup of coffee.

However, when adenosine levels are high, due to the practice of sleeping little, the action of the substance intensifies even more after caffeine consumption.

In turn, the body can understand that caffeine is being used to block the production of adenosine, which causes it to go to work producing more adenosine than normal.

Therefore, adenosine buildup can cause drowsiness in some people and even after having a cup of coffee or green tea, these people will have the feeling that sleep is greater.

4- Metabolic Problems

Not everyone has the same metabolism, there are those who have a more intense metabolic rate and others who have a slower body in performing functions.

This is also one of the reasons why caffeine makes you sleepy, as it the energetic action of the stimulant will be slower in these situations.

In turn, problems such as hypothyroidism can also contribute to some people feeling sluggish and even more sleepy after drinking a cup of coffee.

5- Sleep Deprivation

Sleeping little and sleeping badly disrupts the human body, which confuses day with night and vice versa.

In this situation, sleep deprivation ends up interfering with everyday life, and not even caffeine or other energetic substances make the feeling of cheer and alert happen.

6- Interaction with other medications

People who use medications such as antidepressants and tranquilizers experience drowsiness with or without the use of caffeine.

However, the Interaction between caffeine and some of these drugs intensifies sleep and reduces concentration and alertness.

7- Dehydration


Caffeine has a diuretic action, especially when consumed in the form of coffee.

When a person replaces water with coffee, he ends up having a feeling that he is hydrated.but in fact, excessive coffee consumption increases dehydration.

Because as a form of defense, the organism takes more care when using the water available in bodily functions, which makes the body slower and drowsy.

Therefore, dehydration is also one of the reasons that caffeine makes some people sleepy.

How to Avoid Getting Drowsy After Drinking Caffeine


1- Sleep well

Set a fixed time to sleep and wake up every day, it is important to maintain this cycle so as not to harm the body’s rest and to avoid excessive production of adenosine.

2- Drink more water and less coffee

Many people claim that they are not very thirsty during the day, especially those who drink a lot of coffee.

However, coffee, despite having water, is a drink that has many chemical substances in the composition.

Therefore, these substances need to be metabolized and absorbed by the organism, which makes the existing water levels in the intracellular space insufficient for the complete functioning of the body.

In the long term, dehydration compromises the body’s effectiveness in reacting to stimuli from food, for example.

3- Watch your weight

Obesity and overweight causes the body to become slowerwhich facilitates the feeling of drowsiness during the day.

In this case, it is essential to do physical activities and take care of the calories ingested on a daily basis, in order to avoid problems with weight that compromise hormone production.

4- Take exams every year

Biochemical markers are important to avoid imbalance in bodily functions. Therefore, performing blood tests and dosage of vitamins and minerals is essential to correct nutritional deficiencies and endocrine disorders.

Caffeine can make you sleepy: Frequently Asked Questions


Why doesn’t coffee keep me up at night?

Caffeine only masks the intrinsic function of adenosine, after the temporary effect of the substance, the cells continue to produce it and adenosine accumulates in the body, giving the false sensation that coffee makes you sleepy.

How long does the effect of caffeine last on the body?

Caffeine is rapidly metabolized and has a half-life of approximately 5 hours, varying from organism to organism.

Can you drink caffeine on an empty stomach?

Taking caffeine on an empty stomach increases cortisol levels in the body, which can lead to irritability and other unwanted symptoms during the day.


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