Help! Caffeine makes me sleepy! How does caffeine affect ADHD?

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Your Health Magazine Contributor

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Help! Caffeine makes me sleepy! How does caffeine affect ADHD?

Ask five people with ADHD what coffee does to them, and you’ll probably get five different answers. The link between caffeine and ADHD first started to blow up when people on TikTok noticed this paradoxical effect of caffeine on ADHD, saying, “Hey, why does coffee make me tired?”

But the answer is not that simple. In this article, we’ll explore what neurobiology has to say about caffeine effects on ADHD and whether you, as an ADHDer, should rely on coffee.

Caffeine effects on ADHD: What research says

Caffeine is a natural stimulant that is primarily found in coffee, but also green tea, chocolate, guarana, and energy drinks. It helps with sleepiness because it blocks adenosine receptors in the brain. So, caffeine doesn’t reduce tiredness; it just temporarily “masks” it.

But why does caffeine affect neurotypical people and people with ADHD differently? People with ADHD may differ in aspects of brain function and neurotransmitter regulation, but caffeine responses vary widely from person to person. An online ADHD test for adults may help identify symptoms worth discussing with a qualified professional, but it does not confirm an ADHD diagnosis.

What effects does caffeine have on ADHD? Contradicting ones, as seen below. So many factors impact how an ADHDer will react to coffee: genetics, caffeine tolerance, dosage, sleep quality, medication use, age, etc.

Some ADHDers become more sleepy after coffee

You know this feeling when you grab a cup of coffee to wake up… just to fall asleep five minutes afterward? Some people with ADHD report feeling calmer or even sleepy after caffeine, while others feel more alert, anxious, or stimulated.

ADHD involves differences in brain systems related to attention, arousal, and dopamine signaling, but it is not as simple as saying that everyone with ADHD has a universally low dopamine level. Individual responses to caffeine can vary based on genetics, tolerance, sleep, medication use, and other factors.

When an ADHDer drinks coffee, caffeine can influence brain systems involved in alertness and dopamine signaling. Some research has explored how caffeine may increase dopamine activity, but this does not mean it simply raises dopamine to a “normal” level or reliably explains why some people with ADHD feel sleepy. The calming or sleepy response reported by some people is still not fully understood.

Note: feeling sleepy after coffee is not considered a sign or diagnostic criterion of ADHD.

Caffeine can improve alertness and concentration

The same mechanism (adenosine ↘ dopamine ↗) might not trigger sleepiness in ADHDers. Some of them can receive boosts in the form of better concentration and an increase in energy. That can feel like clearer focus or a calmer ability to start tasks, especially if your ADHD makes you tired or under-aroused to begin with.

So should every ADHDer drink coffee as treatment? Not, really. Research suggests this effect is usually modest and not reliable enough to rely on as a treatment. But it can be a nice way to boost mood and concentration occasionally.

Some ADHDers сan become more irritable after coffee

That said, caffeine is a stimulant. The side effects of taking it too much or when you have medical restrictions against caffeine can be serious:

• insomnia
• restlessness
• irritability
• rapid heartbeat
• gastrointestinal issues

Poor sleep makes ADHD symptoms worse the following day, leading some people to drink even more caffeine to compensate. This cycle can temporarily improve one ADHD symptom and worsen the other.

Is caffeine a friend or foe for ADHD? Pros and cons

It’s both and neither. Everything is highly individual. In the table below, we provided the most common pros and cons of caffeine for ADHD:

In the section below, we help you determine whether caffeine is your friend or foe, taking into account the unique factors of your biology and lifestyle.

Sooo, can I drink coffee/energy drinks as someone with ADHD?

It depends. There is no universal recommendation, but here’s how to determine whether caffeine will be good for your ADHD:

• Do you have sleep problems (especially with falling asleep)?
• Do you take ADHD medication?
• Do you experience anxiety to the point that it interferes with your life?
• Do you have a history of addiction (personal & family history)?
• Do you have problems with physical health?

If any of these factors apply, it may be worth discussing regular caffeine use with a healthcare professional, particularly if you take stimulant medication or have a condition that could be affected by caffeine.

But if none of these factors apply to you, moderate caffeine intake may be perfectly reasonable. Here’s how to drink caffeine safely for ADHD:

• Choose green tea as a caffeine source instead of highly caffeinated energy drinks or high-sugar coffees.
• Drink your coffee mid-to-late morning.
• Avoid caffeine in the late afternoon or evening.
• Drink plenty of water. Caffeine makes you go to the toilet often, so drink enough water to avoid dehydration.

Finally, remember that research has not shown caffeine to be effective as an ADHD treatment. Your temporary improvement is from the general stimulating effects of caffeine.

Almost forgot the last rule: enjoy your coffee! Part of the reason why you feel better after caffeine is that you enjoy the process of making, getting, and drinking it. This whole ritual can bring positive emotions. Embrace them!

FAQs about ADHD and caffeine

Does caffeine make ADHD sleepy?

Sleepiness is one possible effect of caffeine on ADHD. Researchers believe this is likely due to individual differences in dopamine regulation. Coffee triggers an increase in dopamine, which means a return to the baseline for people with ADHD. This baseline can feel really calm and relaxing to them.

Is caffeine good for ADHD?

It depends on the individual. Moderate caffeine may temporarily improve concentration and reaction time for some people. Research, though, has not found any specific effects of caffeine on ADHD specifically. Plus, it’s worth remembering caffeine’s side effects. If anxiety, poor sleep, irritability, etc., outweigh the good effects, it’s better to stop caffeine intake.

Does caffeine make ADHD worse?

No, but it can indirectly worsen certain symptoms. Caffeine messes with sleep. And problems with sleep actually do worsen ADHD symptoms: attention, impulsivity, and emotional regulation.

Does Caffeine Help You Focus With ADHD?

For some people, yes. The effects are temporary and hard to predict, though. Because caffeine blocks adenosine receptors that mediate sleepiness, it can increase wakefulness and improve attention for a short period. However, prescription ADHD medications act on dopamine and norepinephrine much more directly and consistently. If focus problems regularly interfere with daily life, it’s better to seek a proper ADHD evaluation than rely on coffee as your primary strategy.