When you reach for that extra caffeine boost, you might think you’re just getting a jitter, but sometimes the buzz can turn deadly. In this rundown of 10 times caffeine has claimed lives, we explore shocking cases where the stimulant went from pick‑me‑up to fatal overdose.
Why 10 Times Caffeine Can Be Lethal
10 Latte, Mountain Dew, Energy Drink
A 16‑year‑old South Carolina teen named Davis Cripe was the picture of a typical high‑school kid—healthy, happy, a budding drummer who kept out of trouble.
During lunch, he slipped out of school, hopped in his car, and drove to a fast‑food joint where he ordered a café latte, washed it down with a Mountain Dew, and gulped an energy drink before heading to his art class.
The caffeine overload spiked his heart rate so dramatically that he suffered a cardiac arrest right in the classroom. Though a teacher called 911, the damage was already irreversible. An FDA spokesperson later confirmed that the sheer volume of caffeine in such a short span can be fatal even for those without pre‑existing heart conditions.
9 Hour Energy
People seeking a calorie‑free pick‑me‑up often turn to tiny energy shots, assuming they’re harmless because of their size. In reality, those petite bottles pack a punch that many underestimate.
Between 2009 and 2012, 5‑Hour Energy drinks were linked to 13 deaths and 33 hospitalizations. Dr. Sean Patrick Nord of USC likened consuming several shots in a short period to drinking 30–40 cups of coffee.
The manufacturer, however, dismissed these reports as mere “claims” and refused to alter the formula. Founder Manoj Bhargava likened excessive consumption to drowning in water, warning users to follow the directions precisely.
8 FCKD UP And Four Loko
Mixing caffeine with alcohol in drinks like Four Loko created a dangerous cocktail that sent several young adults into reckless behavior—and, in some cases, death. The high alcohol content paired with caffeine made the intoxication set in faster and more intensely.
Even someone with a high tolerance could become dangerously impaired after just one Four Loko. At a 2010 college party, 20‑year‑old Jason Keiran consumed three cans—equivalent to 18 light beers and several cups of coffee—resulting in a manic episode that ended tragically when he took his own life.
Following the incident, the FDA investigated Four Loko, prompting Phusion Projects to strip caffeine from the beverage.
Meanwhile, Canadian brand FCKD UP seemed to ignore the warning. In 2018, 14‑year‑old Athena Gervais drank the drink at a woodland party, behaved erratically, and vanished, later found dead in a stream. Her family sued, and the manufacturer halted production.
7 No Doze
In 2007, 19‑year‑old James Stone was determined to land a job and turned to No‑Doz tablets to stay awake while flooding the internet with applications.
Believing the pills were equivalent to a single cup of coffee, he ignored the lack of dosage warnings and consumed 25–30 tablets in a short burst. Shortly after, he felt unwell, rose to use the bathroom, and collapsed from a heart attack.
Novartis, the maker of No‑Doz, claimed Stone’s death was an isolated incident, emphasizing the product’s FDA approval. Further investigation revealed a prior death in 1998 when a young adult consumed an entire bottle of No‑Doz on a dare.
6 Monster Energy
Monster Energy’s marketing, featuring extreme‑sport athletes, encourages teens to pair the drink with intense physical activity—a risky combination given caffeine’s heart‑rate‑raising effects.
In 2015, 19‑year‑old Dustin Hood downed three and a half cans of Monster within 24 hours, then played a basketball game. The blend of caffeine and exertion triggered a cardiac arrhythmia, causing him to collapse on the court and later die in hospital.
The brand has faced multiple lawsuits: a 2012 case involving a 14‑year‑old who died after drinking only two cans, and a class‑action suit accusing Monster of classifying its drinks as dietary supplements to avoid ingredient disclosure.
5 Coffee Cancer Risk
Defenders of coffee often argue it’s safer than energy drinks, but the reality is more complex. A single 12‑ounce Starbucks “tall” cup contains as much caffeine as three Red Bull cans, and the chain offers sizes up to 31 ounces (trenta).
In March 2018, a California court ruled that acrylamide—a chemical formed when coffee beans are roasted—poses a cancer risk. The Council for Education and Research on Toxics sued to force warning labels on coffee cups at retailers like Starbucks.
Coffee companies continue to fight the ruling, fearing the impact on sales, while experts remain divided over the decision’s scientific merit.
4 An Experiment Gone Awry
Northumbria University researchers wanted to discover the caffeine threshold athletes could endure while exercising, so they administered a powder dose equal to 300 cups of coffee to two sports‑science majors.
Both subjects began their workouts hooked to heart monitors. Unsurprisingly, they displayed severe overdose symptoms, prompting immediate hospitalization.
One student, Luke Parkin, recovered fully, but his partner Alex Rossetta suffered brain damage and now lives with short‑term memory loss. The university issued a formal apology and was fined £400,000 for the reckless trial.
3 Mystery Energy Drink
A 28‑year‑old amateur motocross racer consumed seven to eight cans of an unnamed energy drink before a race in 2007. He performed well initially, but after his second race he felt a dull chest ache.
Mistaking the pain for something minor, he kept racing until he collapsed. Hospital doctors found no other cause for his cardiac arrest; the excessive caffeine was the likely culprit.
Although he survived, the incident illustrates how easy it is to overlook warning signs of a caffeine‑induced heart attack, especially when you feel invincible.
2 Bullet Energy Drink
Bullet, a cheap energy drink popular in several African nations, entered the headlines when 2014‑year‑old Elijah Nwankwo accepted a $100 bet to gulp eight cans in one sitting.
After downing the drinks, he slipped into a coma. Friends rushed him to the hospital, but the damage was irreversible; he died, losing both the wager and his life.
Bullet’s low profile means there’s scant public information about its caffeine content, and the company, like many others, pays athletes to showcase the product, encouraging risky multi‑pack consumption.
1 Unnamed Man In Japan
In 2015, a man in his twenties working a 24‑hour shift at a Japanese gas station needed to stay alert for both his night and day shifts. He resorted to drinking a large amount of caffeinated beverages to power through.
After the marathon caffeine binge, he suffered a fatal overdose—the first recorded caffeine‑related death in Japan. Autopsy results shocked local medical researchers, who had previously believed such a death was impossible.
The incident prompted at least one Japanese energy‑drink company to issue a voluntary warning against excessive consumption and mixing caffeine with alcohol.
Shannon Quinn, a writer from Philadelphia, reported the story; you can find her work on her personal website or follow her on Twitter.