Coffee, energy drinks and alcohol can trigger or make palpitations more noticeable in some people. Reactions differ, and symptoms after a drink do not identify the heart rhythm or establish that the drink is the only cause.
Call 112 in Sweden for palpitations with chest pain, severe breathlessness or fainting. Intense symptoms that persist need prompt medical assessment even if they began after caffeine or alcohol.
What to record after coffee or an energy drink
Start with what the heart felt like: occasional extra beats, a steady fast rhythm or an irregular rhythm. Note when it started, approximately how long it lasted and whether you were resting or active. Keep the drink information alongside the symptoms, rather than using it as a diagnosis.
A “cup” is not a consistent dose. Size and caffeine content vary, and tea, energy drinks, supplements and some medicines may contribute to the same day’s intake. Bring product names and approximate amounts if available. There is no personal safe threshold that this article can calculate from the number of cups you drink.
Alcohol and a racing heart the next day
Describe symptoms the following morning as well as those while drinking. Include sleep disruption and other symptoms in the account. Recurrent palpitations should not automatically be dismissed as a hangover. A clinician may need to assess the rhythm and consider other explanations.
If you regularly drink heavily or develop shaking, sweating and marked anxiety when you stop, contact healthcare for help planning a change. Severe alcohol withdrawal can be dangerous. Confusion or seizures require emergency help. A self-directed “test week” is not a suitable substitute for support when withdrawal is a concern.
A trigger diary that does not provoke symptoms
| Observation | Useful detail |
|---|---|
| Drink or product | Name, approximate amount and time; include supplements. |
| Episode | Start, duration, regular or irregular feeling, other symptoms. |
| Other circumstances | Sleep, nicotine, activity and changes in prescribed or non-prescription products. |
| Follow-up question | What pattern needs assessment, and would recording the rhythm help? |
Do not deliberately drink more of a suspected trigger to obtain a clearer answer. If symptoms improve after a change, that is useful information, but it still does not establish the rhythm. Do not stop a prescribed medicine to make the diary easier to interpret.
When is an appointment appropriate?
Arrange an assessment for recurrent palpitations, a clear change in familiar symptoms or symptoms that affect daily life. Mention known heart disease when making contact. In Sweden, a vårdcentral is a usual starting point; 1177 can advise on where and how quickly to seek care.
The assessment may involve an examination and an ECG. Longer monitoring is considered according to the pattern and frequency of episodes. Ask what would make the clinician choose a monitor and what you should do if an episode happens while waiting.
Questions worth asking
- Does the description suggest that the rhythm needs to be recorded?
- Could any medicine or supplement contribute, and who should review it?
- Which symptoms mean that I should seek urgent help?
- When should I return if symptoms continue despite changing a suspected trigger?
Common questions
Is decaffeinated coffee a guarantee against palpitations?
No. Continuing symptoms need a broader assessment than simply changing drinks.
Does everyone with palpitations after coffee need a Holter monitor?
No. Testing depends on the symptoms, examination and episode pattern. A diary helps the discussion but does not replace clinical judgement.
Sources and further reading
- 1177: Hjärtklappning (in Swedish)
- 1177: Alkoholberoende (in Swedish)
- Läkemedelsboken: Icke-farmakologisk behandling vid arytmier (in Swedish)
Sources and links checked on 22 October 2026. Editorial team: Hagakliniken. This is general information and does not replace an individual medical assessment.