How to Tell if Someone is Drunk: 6 Signs of Intoxication and How to Spot a "Fake Drunk"

Emily Chan
Feb 2
3 min read

In social gatherings or business dinners, we often hear friends claim they are "totally fine" or "completely wasted." However, because alcohol tolerance varies from person to person, it can be difficult to gauge someone's true state. Learning how to identify the signs of being drunk is essential—not only so you can provide care but also to prevent accidents. Here are 6 scientific and practical indicators to help you recognize symptoms of alcohol intoxication.

1. Slurred Speech and Incoherent Conversation

Alcohol directly impacts the brain’s language centers. Monitoring how someone speaks is the most immediate way to judge their sobriety.

Slurred Speech: Their words become muffled, or they seem to have a "thick tongue." Their speaking pace may also become erratic.
Loss of Logic: They may repeat themselves, use the wrong words, or struggle to finish a sentence. If a usually eloquent person suddenly struggles to communicate, it’s a clear sign of cognitive impairment from alcohol.

2. Loss of Physical Coordination and Balance

Alcohol interferes with the cerebellum, the part of the brain responsible for balance and fine motor skills.

Stumbling Gait: Look for swaying, an inability to walk in a straight line, or difficulty standing still.
Fumbling Fine Motor Skills: Observe how they handle a glass, use their smartphone, or hold their keys. Clumsiness or shaking hands are indicators of moderate to high intoxication.

3. Slowed Reflexes and Cognitive Decline

As blood alcohol concentration (BAC) rises, neural transmission slows down.

Delayed Response: They may take several seconds to process a simple question, or they may have a "blank stare" with eyes that struggle to focus.
Lack of Focus: They are easily distracted by the environment and cannot maintain a coherent thread in a conversation.

4. Extreme Mood Swings (Emotional Instability)

Alcohol weakens the prefrontal cortex, which normally inhibits impulsive behavior and regulates emotions.

Personality Shifts: A quiet person might become loud and boisterous, while a cheerful person might suddenly burst into tears or become argumentative. These drastic departures from their usual personality are classic red flags of drunkenness.

5. Physiological Signs: Facial Flushing and Glassy Eyes

Facial Flushing: While a red face (often related to acetaldehyde dehydrogenase deficiency) doesn't always mean someone is "drunk," it indicates the body is processing alcohol.
The Eyes: If flushing is accompanied by glassy, bloodshot eyes or a loss of focus, the probability of intoxication is extremely high.

6. The Classic Denial: "I’m Not Drunk!"

According to social observations, a large majority of people who loudly proclaim "I'm not drunk!" are often the ones closest to passing out. This is a psychological compensation mechanism—an attempt to mask the fear of losing control.

How to Perform a Simple "Sobriety Test"

If you are unsure of someone's condition, try asking simple logical questions to test their mental clarity:

Time Test: "Do you know roughly what time it is?"
Spatial Awareness: "How are you planning to get home later?"
Number Test: Ask them to count backward from 20. If they are confused or unable to perform these basic tasks, their brain is significantly affected by alcohol.

Safety Alert: Distinguishing Between Drunkenness and Harassment

It is vital to stay vigilant in social settings. There is a common saying in social psychology: those who use "drunkenness" as an excuse for inappropriate physical contact (harassment) are usually 90% sober. A truly intoxicated person typically exhibits fatigue, vomiting, or a loss of motor function, rather than the calculated coordination required for harassment. Do not let "being drunk" be an excuse for bad behavior.

If you determine that someone is drunk, stop serving them alcohol immediately and ensure they are safe. Most importantly: Never let a drunk person go home alone, and strictly prohibit drinking and driving. By looking out for one another, we can ensure the night ends on a happy and safe note.

>>>>> [Beginner Class] EP2: Drunkenness dodge teach you how to know if someone is genuinely drunk or faking it?