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Can Caffeine Cause Heart Palpitations, and When Is It Serious?
Caffeine heart palpitations are a known effect of too much caffeine, along with a fast heart rate and higher blood pressure. One SodaSlim capsule, a capsule and not a drink, holds 138 mg of caffeine, 34.5% of the 400 mg a day the FDA gives for most healthy adults. People with a heart rhythm problem should ask a doctor first.
Written by the SodaSlim label deskUpdated · 4 min read
Can caffeine cause heart palpitations?
Yes. The FDA lists a fast heart rate, palpitations and high blood pressure among the effects of too much caffeine, with jitters, poor sleep and nausea (FDA, Spilling the beans: how much caffeine is too much).
MedlinePlus adds that caffeine raises blood pressure. People with an irregular heartbeat or high blood pressure should check with a provider before using it (MedlinePlus, Caffeine).
For most healthy adults, 400 mg a day is not generally linked to negative effects (FDA, Spilling the beans: how much caffeine is too much). Sensitivity differs from person to person, and some conditions and medicines raise it.
Which heart symptoms after caffeine need care right away?
Chest pain, fainting, trouble breathing and a racing heart that will not settle need care now. Call 911 for chest pain or fainting.
Cleveland Clinic lists early signs as a faster heart rate, palpitations, headache, anxiety, jitters and trouble sleeping. Its serious signs include trouble breathing, sudden high blood pressure, muscle twitching, confusion and seizures. For a suspected overdose, call 911 or Poison Help at 1-800-222-1222 (Cleveland Clinic, Caffeine overdose).
| Sign | Step |
|---|---|
| Mild jitters, a brief flutter | Skip more caffeine today; tell your doctor if it repeats |
| Pounding heart that lasts | Stop the capsule and call a doctor |
| Chest pain or fainting | Call 911 |
| Trouble breathing, confusion, seizure | Call 911 or Poison Help |
Who should ask a doctor before taking a caffeine capsule?
Anyone with a heart rhythm problem, high blood pressure or anxiety should ask first, as should anyone pregnant or nursing (MedlinePlus, Caffeine). The SodaSlim label also bars use under 18.
Medicines matter too. Ask a pharmacist if you take heart or blood pressure medicine, because green tea extract has been reported to lower levels of nadolol, with one arrhythmia relapse (MSK, Green tea (About Herbs)).
Keep taking prescribed medicine. A supplement is not a medicine, and the FDA has not evaluated the label's statements.
SodaSlim: 30 capsules, 30-day bottle1 capsule a day · 2, 3 or 6 bottles · price and guarantee terms at checkout
See packsHow much of a SodaSlim capsule is caffeine?
Caffeine anhydrous is 138 mg of the 658 mg listed, or 21.0%, and it is the largest line. The green coffee and green tea extracts add a little more caffeine that the label does not print.
658 mgof listed ingredients in one capsule, every amount printed
- Green coffee bean extract130 mg19.8% of the listed weight
- Raspberry ketone130 mg19.8% of the listed weight
- Garcinia extract130 mg19.8% of the listed weight
- Caffeine anhydrous138 mg21.0% of the listed weight
- Green tea extract130 mg19.8% of the listed weight
Share by printed weight. Four lines are 130 mg and caffeine anhydrous is 138 mg, so no single ingredient dominates the capsule. The capsule shell is extra.
Read the caffeine content page and the side effects page before you decide.
How long does a SodaSlim pack last?
One bottle holds 30 capsules, so 3 bottles last 90 days and 6 bottles last 180. The checkout shows price and guarantee terms.
90-day supply
3 bottles: 90 days
90capsules · price shown at checkout
Ships from the U.S. · money-back guarantee
Order 3 bottles
180-day supply
6 bottles: 180 days
180capsules · price shown at checkout
Ships from the U.S. · money-back guarantee
Order 6 bottlesA 2-bottle pack is also shown by the brand. Check your medicines with your doctor or pharmacist before you order.
FAQ01
SodaSlim questions people ask
Why does caffeine make my heart pound?
Caffeine is a stimulant, and a fast heart rate and palpitations are listed effects of too much of it (FDA, Spilling the beans: how much caffeine is too much). Sensitivity differs from person to person. If it keeps happening, tell your doctor.
How long do caffeine palpitations last?
Our sources give no set time. A brief flutter that fades is common, but a pounding heart that lasts, chest pain or fainting needs care now (Cleveland Clinic, Caffeine overdose). Do not wait to see if it passes.
Can I take a caffeine capsule with a heart rhythm problem?
Ask your doctor first. MedlinePlus says people with an arrhythmia should check with a provider before using caffeine (MedlinePlus, Caffeine). Do not stop any prescribed heart medicine on your own.
Sources (4)
- Spilling the Beans: How Much Caffeine Is Too Much?U.S. Food and Drug Administration, 2024
- CaffeineMedlinePlus (U.S. National Library of Medicine), 2021
- Caffeine OverdoseCleveland Clinic, 2024
- Green TeaMemorial Sloan Kettering Cancer Center, 2026
Who wrote this02
Written and reviewed by
Pages built from the label, the seller’s materials and linked NIH, FDA, FTC, Mayo Clinic and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site of Thesodaslim, a USA authorized SodaSlim retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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