How to calm down after too much caffeine

To calm down after too much caffeine, stop taking more, then work through your body: slow your exhale, take a short walk to burn off the adrenaline, and add a few minutes of bilateral stimulation like the butterfly hug. Most jitters ease within 3 to 5 hours as your body clears the caffeine.

That third cup hit about twenty minutes ago, and now your hands won’t quite sit still, your heart’s doing something you can feel in your throat, and you can’t tell anymore if you’re wired or just anxious. Probably both, and the good news is you don’t have to just sit with it until it passes on its own.

Why does caffeine make you feel jittery and wired?

Caffeine works by blocking adenosine, the brain chemical that normally builds up through the day and signals it’s time to slow down. With adenosine locked out of its usual receptors, your brain reads that as a green light, and your body responds with more adrenaline than it would otherwise release (UCLA Health, 2025).

Adrenaline is your body’s fight-or-flight messenger. It’s built to show up when something threatens you, not because you finished a large cold brew, but your nervous system doesn’t check the source before it reacts: heart rate climbs, muscles tense, and attention narrows the same way it would for a real threat (Harvard Health Publishing, 2024). The jittery, keyed-up feeling is a real stress response. It’s just one you started with a drink instead of a deadline.

How long will this actually last?

Longer than you’d like, shorter than it feels right now. Caffeine’s half-life, the time it takes your body to clear half of what you took in, averages about 5 hours but can range from roughly 1.5 to 9.5 hours depending on your metabolism, medications, and whether you’re pregnant (National Academies Press, 2001). Most people feel the sharpest jitters ease within 3 to 5 hours, though a lower hum of alertness can linger past that.

None of the steps below will clear caffeine out any faster. What they do is calm your body’s response to it, which is most of what actually feels bad right now.

What actually calms the jitters down?

1. Stop adding to it. No more caffeine, and skip alcohol too; it won’t cancel caffeine out, it’ll just leave you jittery and impaired at the same time.
2. Slow your exhale. Breathe in for about four seconds and out for six to eight, for two or three minutes. A longer exhale is one of the better-tested ways to nudge your body toward rest-and-digest mode (Frontiers in Human Neuroscience, 2018); our fast calm-down sequence walks through the full breathing pattern if you want more than the basics.
3. Move, even briefly. A short walk gives the extra adrenaline somewhere to go, and it tends to ease restless, can’t-settle energy faster than sitting still and waiting it out.
4. Add a couple minutes of bilateral stimulation. Cross your arms and tap left, right, left, right on your shoulders (the butterfly hug) while you let the wired feeling sit there without fighting it. Bilateral stimulation (BLS), the rhythmic left-right technique at the center of EMDR therapy, is built for exactly this kind of physical activation, whatever set it off. EmEase, a self-guided EMDR app, runs the same left-right rhythm through a moving on-screen target or alternating tones in the web app, paced however you like, if you’d rather be guided than count taps yourself. Our beginner’s guide to self-guided bilateral stimulation covers the full technique.
5. If a racing heart is the main issue, work on it directly. A caffeine-driven racing heart responds to the same steps for slowing a racing heart as any other adrenaline spike.

If your usual caffeine is coffee, it’s worth knowing that tea pairs caffeine with L-theanine, an amino acid a 2010 study in Nutritional Neuroscience found improves alertness and calmness together, more than caffeine alone. It won’t undo a jittery hour you’re already in, but it’s a real reason a cup of tea can feel calmer than a cup of coffee.

And if what you’re feeling is closer to a wave of panic than plain jitteriness, that tracks: caffeine’s adrenaline surge and an anxious rush of adrenaline run on the same wiring, so the same steps calm both.

When is it more than just jitters?

Ordinary overdoing it, an extra cup, a second energy drink, settles with time and the steps above. Mayo Clinic notes that up to 400 mg a day, roughly four cups of brewed coffee, 10 cans of cola, or two energy shots, is considered safe for most healthy adults, and that going well past that is where nervousness, a racing heart, tremors, and stomach upset tend to show up (Mayo Clinic, 2025). At the extreme end, rapidly taking in very large amounts, especially from concentrated caffeine powder or pills, has been linked to serious effects including seizures, per that same Mayo Clinic overview.

If your heart won’t settle after a while, you feel chest pain or faintness, you’re vomiting, or you took an unknown or unusually large dose, call your doctor or Poison Control (1-800-222-1222 in the US) instead of waiting it out.

For everything short of that, this is temporary. Skip the next cup, breathe, move, tap it out, and give your body the few hours it needs to finish the job on its own.