Four Loko is one of the most potent alcoholic beverages sold in convenience stores, and yes, it carries real health risks. A single 23.5-ounce can contains up to 14% alcohol by volume depending on the state, which translates to roughly four to five standard drinks in one brightly colored, fruit-flavored container. That amount of alcohol, consumed quickly from a single can, is enough to push most adults past the legal definition of binge drinking in one sitting.
What’s Actually in a Can
Four Loko is a flavored malt beverage sold in 23.5-ounce cans at ABV levels ranging from 6% to 14%, depending on state regulations. At the higher end, one can delivers about as much alcohol as a bottle of wine or a six-pack of light beer. It also packs roughly 660 calories per can, much of that from sugar, which masks the taste of alcohol and makes it easy to drink fast.
The original formula, sold before 2010, also contained caffeine. That version was pulled from the market after the FDA declared added caffeine in alcoholic malt beverages an “unsafe food additive” and threatened to seize products from four companies, including Four Loko’s manufacturer. Today’s version no longer contains caffeine, but the core danger, a very large amount of alcohol in a cheap, sweet, easy-to-drink package, remains.
Why One Can Is More Dangerous Than It Seems
Most people don’t think of a single can as four or five drinks. But that’s what it is. Finishing one 14% ABV Four Loko in under an hour or two meets the clinical definition of binge drinking: a pattern that raises blood alcohol concentration to 0.08% or higher. For smaller individuals, teenagers, or anyone who hasn’t eaten recently, the same can could push BAC considerably higher than that.
The sweetness and fruity flavoring hide the alcohol’s bite, so your body doesn’t send the usual “slow down” signals the way it might with straight liquor or even beer. People drink faster than they realize, and because all that alcohol is sitting in one container, there’s no natural pause between servings the way there would be if you were opening individual beers.
BAC can also continue to rise after you stop drinking. Alcohol still in your stomach and intestines keeps entering the bloodstream even if you put the can down or pass out. That lag is part of what makes rapid consumption so risky: by the time you feel the full effect, you may already be past a dangerous threshold.
The “Wide Awake Drunk” Problem
Although Four Loko no longer contains caffeine, many people still mix it with energy drinks or consume it alongside coffee. This combination is especially dangerous because caffeine blocks the brain’s drowsiness signals without actually reducing impairment. You feel alert and capable while your coordination, judgment, and reaction time are severely degraded.
Research on caffeinated alcohol found that college students who mixed alcohol with energy drinks had a threefold risk of reaching a BAC at or above the legal driving limit compared to those drinking alcohol alone. They also had four times the odds of intending to drive afterward. Even after accounting for the fact that these drinkers consumed more total alcohol, they still experienced significantly higher rates of serious consequences: injuries requiring medical attention, sexual assault, and riding with impaired drivers. Caffeine doesn’t sober you up. It just removes the sleepiness that would otherwise tell you to stop.
Emergency Room Cases and Young Drinkers
Four Loko has been directly linked to emergency department visits, particularly among young people. A published case series from 2010 examined ED visits tied to Four Loko intoxication over a four-month period. Of the eleven patients identified, the median age was 16.4 years, and over 90% were under the legal drinking age. All arrived by ambulance. More than a third were found in high-risk situations with altered mental status, including on subway tracks and in parks after dark. Two patients had blood alcohol concentrations above 200 mg/dL, a level associated with severe impairment and risk of alcohol overdose. Two were admitted to the hospital, one for seizures and another for a dangerously elevated heart rate.
These cases illustrate a pattern: Four Loko’s low price, wide availability, and candy-like flavoring make it attractive to underage drinkers who may have little experience gauging how much alcohol they’re consuming.
Signs of Alcohol Overdose
Drinking the equivalent of four to five drinks in a short window puts you in the range where alcohol overdose becomes possible. The warning signs include:
- Mental confusion or stupor
- Vomiting, especially while semi-conscious
- Seizures
- Slow or irregular breathing (fewer than 8 breaths per minute, or gaps of 10 seconds or more between breaths)
- Slow heart rate, clammy skin, or bluish skin color
- Loss of consciousness with inability to wake up
- Absent gag reflex, which raises the risk of choking on vomit
At high enough levels, alcohol begins shutting down the parts of the brain that control breathing, heart rate, and body temperature. It is not safe to assume someone who has passed out will simply “sleep it off.” Choking on vomit while unconscious is one of the most common causes of alcohol-related death, and it happens precisely because the brain can no longer trigger the protective reflexes that would normally prevent it.
Labeling Gaps
One underappreciated risk is that Four Loko’s packaging doesn’t always make the danger obvious. Federal rules make listing alcohol content on malt beverages optional unless a state requires it. The mandatory warning label, required on all alcoholic beverages since 1988, mentions pregnancy risk and impaired driving but says nothing about alcohol overdose or the drink-equivalent count inside the can. There’s no requirement to disclose how many standard drinks a can contains, so a first-time buyer could easily mistake it for a single serving.
If you’re choosing to drink Four Loko, treating each can as four to five separate drinks rather than one beverage is the most important mental adjustment you can make. Splitting a can with friends, eating beforehand, and pacing yourself over several hours rather than finishing one quickly all reduce the chance that a night out ends in an ambulance.