A Cup of Coffee on a Working Table

Why Does Coffee Make Me Sleepy? Know the Reasons

The most common definition of coffee is the wake-me-up drink. As an energy stimulant, coffee does a great job of making you feel sharp and wide awake. But, has it ever happened that instead of feeling sharp, you felt like taking a nap and- wondered why is coffee making me sleepy? 

Coffee affects everyone differently. In this article, we’ll explore what does coffee does to you, why it makes you sleepy and is coffee before bed a good idea? Read on to know the reasons.

Tired Woman in the Office With Cup of Tea and Coffee in Front of Her

Reasons Why Coffee Makes You Sleepy

Here are a couple of reasons coffee makes you feel sleepy.

1. Coffee Blocks Adenosine 

You might be wondering what is Adenosine and what does it have to do with coffee? Adenosine stimulates or manages the sleep-wake cycle in the body while coupling cerebral blood flow in the body. 

When you drink coffee, it binds to the Adenosine receptors. Coffee doesn’t stop the production but delays it. Once the effect wears off, the brain is rushed with Adenosine that eventually leaves you with a caffeine crash or feeling very sleepy forcing you to take a coffee nap. 

2. It Could Be Sugar Crash

If you like your coffee to be sweet with whipped cream, extra sugar, honey, caramel, etc. then you could easily be hit by a sugar crash. 

What is a sugar crash? When you consume sugar more than the required amount, then the insulin levels rise up which causes your blood sugar levels to drop. As your BP decreases your energy levels go down. That’s the major reason why you feel tired after drinking coffee. You might also feel hungry, anxious, irritated, dizzy, or on edge because of a sugar crash.  

Another reason could be the sweet snacks you’ve been consuming with your coffee. As far as we know, coffee and cake make a good combination. People also have a habit of munching sweet puffs or biscuits with coffee. 

Did you know, drinking a lot of coffee can make you feel dehydrated

A Young Woman Sitting in Kitchen While Sipping a Cup of Coffee and Looking in Mobile

3. Coffee Is a Diuretic 

It’s a known fact that caffeine is a diuretic for years. Meaning, it makes you go to the loo often. So, you might notice that drinking coffee can make you lose a lot of water, leaving you tired and cranky. 

Losing all that water reduces the fluid in the blood, which can affect your blood pressure. Coffee dehydration can lower BP, which can result in fatigue and sleepiness. 

Coffee also causes the blood vessels to narrow, which again reduces the activity of the body. So you might want to limit the consumption of coffee.  

4. You Could Be Immune to Coffee

Another reason why coffee makes you sleepy could be you getting immune to caffeine. If you are a regular drinker, then the effects of coffee won’t affect you anymore. This can happen easily with the increased intake of coffee. 

According to a study, when you regularly consume coffee, you can develop a tolerance for it. If you notice the same issues with you, what you can do is cut off caffeine for a few days to regularise your body functions. 

5. Your Body Is Affected Differently by Coffee 

Yes, it’s true. Not everyone feels charged after having coffee. As mentioned earlier, coffee affects people differently. While some might say “coffee makes me anxious” others might experience nausea after coffee. 

Some might not be able to sleep after having it while some can just doze off! This happens due to the different metabolism and functioning habits people have. And to be honest, this is more of a try-and-know-it-yourself case. So, the next time you feel sleepy after coffee, try noticing if it always happens. 

Not everyone needs 6-hours of sleep. Read our blog to know about the sleep crisis, how sleep works, and how much sleep you need.

How Can You Minimize Coffee Effects?

If you don’t want to give up coffee and do not wish to have the after coffee effects either, you can explore some tips to help you deal with it. 

These are really simple yet practical tips you can adapt on a regular basis. 

  • Switch to Decaf Coffee – Uncompromising on the taste, you can choose a decaf coffee with reduced caffeine effects. 
  • Avoid Sugar – Avoiding excess sugar could really help you to reduce those sugar crashes you might have on a regular basis. 
  • Drink Plenty of Water – Coffee is a diuretic that can rapidly decrease the water level in the body. Keeping yourself hydrated can reduce the effect of coffee. 
  • Walk it Out – Since you have the energy in the body, what you can do is, burn some of it with a walk, and it might lessen the effects of coffee.
Decaffeinated Coffee Dusted With Cocoa

Caffeine Limits to Be Considered 

Even though coffee might be everyone’s favorite drink in America, you should always know how much coffee is too much and when to limit it. 

  • For adults: Up to 400 mg/per day can be consumed without causing any harm. 
  • For pregnant & women who are breastfeeding: Up to 200 mg/ per day can be consumed. 
  • For children: Up to 100 mg/ per day can be consumed. 

It’s not only coffee; caffeine can come from other drinks as well. So make sure you follow a healthy drinking habit where you limit your sodas, energy drinks, cold drinks, espresso, etc.

Summing It Up

We all know, a world without coffee seems impossible to deal with, but you also have to notice the effects of coffee on the body. Depending on how much coffee you drink, the symptoms might change from time to time. Now that you know what to do to minimize the effects of coffee, you can easily enjoy coffee minus the after-effects. 


Can I have a coffee before bed?

Caffeine can cause sleep disturbances in some people. It is advised to avoid a cup of coffee 6 hours before going to bed as it is effective up to 5 hours after consumption. 

How long does it take for caffeine to kick in?

Caffeine consumption on an empty stomach can reach the peak in just 30 to 60 mins as it only affects your body for 3-5 hours. If you’re thinking- caffeine doesn’t affect me, then you may be immune to it. 

How long does coffee last when you drink it?

The average time for coffee to stay in the system is up to 5 hours. It reaches its peak in just 30 mins. 

Is it bad to drink coffee at night?

Caffeine and Insomnia are known to have a connection. Drinking coffee at night can lead to restlessness as it tends to charge you up for 4-5 hours. 

But, does coffee keep you awake?

Some people find it hard to sleep after having coffee, while it doesn’t work on the rest. These are the ones who can sleep like a log after consuming coffee. Hence, you should see what effect coffee has on you. If you are struggling to fall asleep, then our blog on sleeping tips might help.

Does coffee affect everyone?

No. Coffee doesn’t work for everyone. Some people are immune to caffeine while some might say that caffeine makes me sleepy. On the other hand, some people cannot drink coffee and can easily get caffeine high. To know if coffee affects you, notice how your body reacts 30 minutes after you drink it.

What drinks help you stay awake?

High energy drinks that have high caffeine levels usually help you to stay awake. You can explore energy drinks from a variety of options available in the market. Right from Monster energy to red bull, the options are wide enough for you. 

Is caffeine bad for the heart?

Not exactly. Caffeine might elevate the blood pressure for a while but doesn’t cause any discomfort to people. Although, people with a heart condition should get a second opinion from a physician before making coffee a regular habit.