Energy Drinks and Teen Heart Health: What Parents Should Know

Energy drinks are everywhere—from convenience stores to sports sidelines. Many teens reach for them to stay awake, boost energy, or improve focus. But for teens with congenital or acquired heart conditions, these drinks can pose unique risks.

We spoke with Eric Ferguson, MD, pediatric cardiologist at Children’s Healthcare of Atlanta Cardiology, to break down what families need to know about energy drinks and the heart.

How Do Energy Drinks Affect the Heart?

Most energy drinks contain high levels of caffeine, a stimulant that makes the heart beat faster and raises blood pressure. These effects place added stress on the heart, and in some cases caffeine can even trigger rhythm disturbances.

“In very high amounts—about 800 mg of caffeine, or 10 cups of coffee—caffeine can even become a risk factor for sudden cardiac arrest,” says Dr. Ferguson.

Which Teens Are Most at Risk?

Teens with the following conditions may be more sensitive to caffeine’s effects:

A history of palpitations or elevated blood pressure
Certain rhythm disturbances, especially premature ventricular contractions (PVCs)
Underlying cardiac dysfunction
Aortic problems, such as a dilated aorta

Effects on Heart Rate, Blood Pressure, and Rhythm

Energy drinks can:

Increase heart rate and blood pressure
Make PVCs more frequent
Cause arterial stiffness, which adds stress to the cardiovascular system

The impact is often greater in teens who don’t normally consume caffeine or those who already have elevated blood pressure.

Can Energy Drinks Trigger Dangerous Arrhythmias?

The answer: possibly.

“Caffeine may trigger disturbances in heart rhythm in susceptible patients,” says Dr. Ferguson. “You’re much more likely to have a complication after drinking 5 Red Bulls in an hour than after just 1.”

Some patients appear more sensitive than others, and there are case reports of arrhythmias occurring in teens with underlying heart disease after excessive caffeine intake.

Warning Signs Families Should Watch For

After consuming an energy drink, teens should seek medical attention if they experience:

Palpitations
Chest pain

Is Any Amount of Caffeine Safe?

There’s no universal “safe limit” for teens with heart conditions. But Dr. Ferguson notes:
“By extrapolating from adult data, probably aiming for less than 200 mg of caffeine per day should be safe.”

What About Before Sports, Exams, or Long Days?

If a teen is considering an energy drink before an event, hydration comes first.
“Drink water until you’re no longer thirsty before even thinking about an energy drink,” says Dr. Ferguson.

Do Doctors Ask About Energy Drinks?

Dr. Ferguson says he always asks about caffeine consumption during clinic visits, including coffee, soda, sweet tea, and energy drinks. The topic often comes up when patients report palpitations or concerns about blood pressure.