Noticing that someone might be under the influence of drugs can be overwhelming, especially someone you care about. Recognizing these warning signs early can make all the difference, whether it’s a friend, family member, or loved one.
In some cases, a person might recover quickly without serious consequences. In others, drug use may signal a deeper issue that needs immediate attention, possibly including participation in a medical detox program.
If you’re wondering how to tell if someone is high, this guide will help you learn the key physical, behavioral, and psychological signs.
Signs and symptoms of substance use
Drug and alcohol intoxication can present in many different ways depending on the substance involved. Stimulants, depressants, opioids, and hallucinogens all produce different effects on the body and mind. Someone using stimulants like cocaine may appear unusually energetic and restless, while someone affected by opioids might seem overly drowsy or detached. Knowing the general signs and symptoms of substance use helps you respond appropriately and seek the right kind of help.
Physical symptoms of substance use
Physical symptoms are often among the first noticeable changes when someone is high. Here are some common indicators:
- Sleeping too much, too little, or at odd times
- Unusual bursts of energy or severe fatigue
- Changes in eating habits — either eating significantly more or less
- Enlarged (dilated) or very small (pinpoint) pupils
- Watery, glassy, or bloodshot eyes
- Slurred speech or impaired coordination
- Unexplained body odors or unusual smells on clothes or breath
- Sweating heavily when it isn’t hot
- Tremors or visible shaking
- Sudden weight loss or weight gain
- Decline in personal hygiene and grooming habits
Physical signs like these, especially when multiple are present at once, can be strong indicators that someone may be under the influence of substances.
Behavioral changes related to substance use
While physical symptoms can be visible, behavioral shifts are just as significant. Substance use often triggers profound emotional and social changes, such as:
- Withdrawing from family and longtime friends
- Spending time with a new, often secretive group of friends
- Loss of interest in favorite hobbies or activities
- Sudden decline in school or work performance
- Uncharacteristic sadness, irritability, or anger
- Increased paranoia or suspiciousness
- Giddiness, restlessness, or hyperactivity
- Acting unusually secretive or defensive about their whereabouts or activities
Recognizing these behavioral patterns can help you understand if someone you know might need support in addressing their drug or alcohol use.
Side effects of being high
Different methods of drug consumption (injection, inhalation, oral use) can cause distinct side effects. Knowing these can help you identify not only if someone is high but also how they might be using substances:
Injecting substances:
- Visible track marks or bruising on arms or other areas
- Scarring or infections around injection sites
- Higher risk for diseases like hepatitis or HIV due to needle sharing
Inhaling or smoking substances:
- Chronic cough or respiratory problems
- Frequent nosebleeds
- Bad breath or dental issues
Oral ingestion of substances:
- Nausea, vomiting, or diarrhea
- Gastrointestinal discomfort
- Slow onset of symptoms, but longer-lasting effects
Regardless of the method, being high can impair decision-making, slow reaction times, and increase the risk of accidents or injury, making early detection critical.
What to do if you think someone is high
If you believe someone is under the influence, it’s essential to prioritize safety first. Stay with them if possible, monitor their condition, and avoid making accusations. Some people may have an adverse reaction to a prescribed medication, but if substance use seems likely, expressing concern in a compassionate, nonjudgmental way is key.
Here are a few helpful tips:
- Speak with empathy and understanding.
- Focus on your concern for their well-being, not judgment.
- Avoid labeling them or making assumptions about their intentions.
- Offer help and support rather than issuing ultimatums.
- Encourage them to seek professional assistance if needed.
Habitual substance use can lead to dependence or addiction, but early intervention greatly improves the chances for lasting recovery.
Find help at Landmark Recovery
At Landmark Recovery, we understand how overwhelming it can feel when someone you care about is struggling with substance use. Our programs provide compassionate, evidence-based care to create lasting change.
If you or a loved one needs support, don’t wait. Complete our online form or call Landmark Recovery at (888) 448-0302 to speak with our recovery specialists.
Choose Recovery Over Addiction
We're here 24/7 to help you get the care you need to live life on your terms, without drugs or alcohol. Talk to our recovery specialists today and learn about our integrated treatment programs.
