Why do I feel anxious after drinking coffee?

Feeling anxious after drinking coffee is common. Caffeine is a stimulant, and in some people it can cause physical sensations that feel a lot like anxiety, such as a faster heartbeat, restlessness, shakiness, or a “wired” feeling.

Here’s why it can happen:

• It blocks adenosine: Caffeine blocks adenosine, a brain chemical that normally helps you feel calm and sleepy. That can make you feel more alert or on edge.
• It can increase stimulation in the body: Caffeine can raise heart rate and blood pressure in some people, and those changes can feel like anxiety.
• The body sensations can be misread as anxiety: Jitters, sweating, or a racing heart can make your brain think something is wrong, which can amplify anxious feelings.
• People vary in sensitivity: Genetics, body size, tolerance, medications, sleep deprivation, and existing anxiety can all make caffeine feel stronger. Variants in the CYP1A2 gene can affect how quickly some people metabolize caffeine.

Ways to reduce coffee-induced anxiety

1. Have it with food rather than on an empty stomach.
2. Cut the dose by choosing a smaller cup, half-caf, or weaker brew.
3. Drink water and avoid stacking caffeine from other sources.
4. Try to identify your trigger level if you already have anxiety or panic symptoms.

When to be cautious

If you get chest pain, severe palpitations, fainting, or anxiety that persists well after the caffeine should have worn off, talk with a healthcare professional. If you have an underlying anxiety disorder, caffeine may be more likely to worsen symptoms.

If coffee reliably makes you anxious, reducing the amount or switching to tea, decaf, or a lower-caffeine option may help.