Substance use can impact a person’s physical, mental, and emotional state in ways that alter their behavior, perception, and decision-making. But what does it mean to be under the influence of drugs or alcohol? The phrase is often used in legal, medical, and social settings, but its definition can vary depending on the context.
From a medical and addiction recovery standpoint, “under the influence” refers to any level of impairment caused by drugs or alcohol. This can range from mild intoxication to a state of complete loss of control over one’s actions.
For those struggling with substance use, recognizing these signs is the first step toward seeking help. Professional drug and alcohol addiction treatment can provide the structure and support needed to regain control and achieve long-term sobriety.
“Under the Influence” Defined
“Under the influence” is commonly understood as being impaired by drugs or alcohol to the point where normal physical and mental functions are altered. This can mean reduced motor skills, poor judgment, or even a complete lack of awareness of one’s surroundings.
From a legal perspective, being under the influence of alcohol means that a person’s blood alcohol content (BAC) exceeds the legal limit. However, impairment can occur even at lower levels, especially for individuals with lower tolerance.
Signs of Being Under the Influence
Recognizing the physical and psychological signs of influence under drugs or alcohol is essential. Whether it’s a loved one, a coworker, or even yourself, knowing these signs can help identify when intervention is necessary.
Physical and Psychological Signs of Being Under the Influence
- Slurred speech – Difficult to understand due to impaired muscle control
- Loss of coordination – Unsteady movements, stumbling, or difficulty standing upright
- Delayed reaction time – Slower responses to stimuli, making driving or operating machinery dangerous
- Drowsiness or fatigue – A sudden lack of energy or appearing unusually tired
- Bloodshot eyes – Red, glassy eyes common in those under the influence of alcohol or drugs
- Excessive sweating or chills – Temperature regulation issues caused by alcohol and certain drugs
- Dilated or constricted pupils – Changes in pupil size
- Increased or decreased heart rate – Stimulants causing rapid heartbeats or depressants slowing them
- Confusion or disorientation – Difficulty following conversations or recalling basic information
- Unusual odors – The smell of alcohol, marijuana, or other substances on the breath or clothing
Behavioral Changes Under the Influence
Being under the influence meaning doesn’t just affect a person’s body—it also significantly alters their behavior. These behavioral shifts can provide clear indicators that someone is impaired.
Common Behavioral Changes When Under the Influence
- Increased risk-taking – Reckless behavior, such as driving while intoxicated or engaging in unsafe activities
- Aggression or irritability – Being confrontational or easily angered
- Poor decision-making – Impaired judgment leading to risky choices, financial problems, or legal trouble
- Emotional instability – Rapid mood swings, from euphoria to depression
- Lack of inhibition – Saying or doing things that would typically be avoided when sober
- Social withdrawal or isolation – Avoiding friends and family, especially if hiding substance use
- Neglect of responsibilities – Missing work, failing to meet obligations, or ignoring personal hygiene
- Memory loss or blackouts – Forgetting conversations, events, or actions taken while intoxicated
- Increased secrecy – Hiding substance use or lying about whereabouts and activities
- Paranoia or anxiety – Heightened nervousness or fear
The Dangers of Being Under the Influence
Being impaired can lead to serious accidents, legal consequences, strained relationships, and long-term health issues. Driving while intoxicated, for example, is one of the most dangerous risks associated with being under the influence of alcohol.
Additionally, chronic substance use can contribute to dependency, making it increasingly difficult to function without alcohol or drugs. If you or a loved one is struggling with substance use, it’s important to seek help before the consequences become irreversible.
Reach Out to Seek Treatment for Substance Use
If you find yourself frequently under the influence of alcohol or drugs and struggling to regain control, you’re not alone. Many people who face substance use challenges feel trapped in a cycle of addiction, but recovery is possible with the right support.
At Landmark Recovery, we offer comprehensive treatment programs designed to help individuals break free from addiction. Our services include detox, residential care, outpatient programs, and aftercare support, all tailored to meet the unique needs of each client.
Take the first step toward recovery today. Contact Landmark Recovery at (888) 448-0302 or online to learn more about our programs and how we can help you build a healthier, substance-free life.

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