How To Tell When Someone Is High

It can be challenging to determine if someone is under the influence of drugs, especially if you’re not familiar with the typical signs. However, learning how to tell when someone is high can help you better understand their behavior and decide how to respond. Recognizing these symptoms isn’t about judging—it’s about gaining awareness to offer support or intervene if necessary. This guide covers some of the most common ways to spot the signs that someone might be high.
Sudden Changes In Behavior

One of the clearest indicators that someone may be high is a sudden shift in their behavior. If they’re usually reserved and suddenly become overly talkative, or if they’re typically energetic and seem excessively mellow, it might suggest drug influence. Knowing their usual behavior can make it easier to spot when something feels off, as certain drugs cause people to act outside of their norm.
Altered Speech Patterns

Speech changes are another telltale sign. Some substances make people slur their words or speak slowly, while others cause rapid or pressured speech. If someone is talking unusually loud, too fast, or mumbling, these can be red flags. Alcohol and cannabis, for instance, may lead to slurred or slowed speech, while stimulants like cocaine or amphetamines may lead to hurried, sometimes nonsensical conversations.
Bloodshot Or Glassy Eyes

Observing someone’s eyes can also be revealing. Certain drugs, like marijuana, can cause bloodshot or red eyes. Alcohol can also make the eyes appear glassy or unfocused. On the other hand, stimulants can cause the pupils to dilate, making them look unusually large. Checking for these physical signs can help you assess if someone may be under the influence.
Unusual Body Movements Or Clumsiness

Drugs often impact coordination and motor skills, so someone who’s high may have trouble with balance, seem unusually clumsy, or display jerky movements. For example, alcohol and sedatives often lead to stumbling or slow movements, while stimulants might cause fidgeting or restlessness. Take note if they seem physically different from their normal state.
Drastic Mood Swings

Mood changes are another common symptom. Someone under the influence might become unusually euphoric, anxious, or irritable. Drugs can intensify emotions or make someone shift from happy to angry quickly. If someone’s mood feels extreme or inconsistent, it could be a sign they are under the influence.
Sensitivity To Light And Sounds

Sensitivity to light and sounds can be a less obvious, but telling, indicator. Some drugs, especially psychedelics, make people highly sensitive to their environment. If someone seems unusually distracted by background noise or overly bothered by lights, it could be a clue.
Changes In Appetite Or Thirst

Substances like marijuana are well-known for increasing appetite, often referred to as "the munchies." Conversely, drugs like stimulants can suppress hunger. Observing a sudden spike or decrease in someone’s appetite can hint at drug use. Additionally, some substances cause intense thirst, leading the person to drink an unusual amount of water.
Drowsiness Or Excessive Energy

If someone seems overly drowsy, struggles to stay awake, or appears to be in a “zoned-out” state, they could be high on depressants. Conversely, if they’re unusually energetic or agitated, stimulants might be involved. Noticing these energy shifts is a simple way to spot drug influence without needing any special knowledge.
Strong, Unusual Odors

Certain drugs have distinct smells. Marijuana, for instance, has a strong, easily recognizable odor. Alcohol has a telltale scent, too. If you notice an unusual smell on someone’s clothes or breath, it can be a sign they have recently used a substance. Recognizing these clues can help you determine how to approach the person and whether you should offer help or guidance.
Understanding how to tell when someone is high can empower you to respond effectively and with empathy. Remember, the goal is not to judge but to help when needed. Familiarity with these signs allows you to act appropriately and support those in your life.
