By Lauren Smith
Updated: 20 June 2023 & medically reviewed by Dr. Kimberly Langdon
Often people are in deep denial about their substance abuse and are only nudged toward help when their loved ones recognize the signs of addiction and raise the alarm. Learning to read these markers, sometimes subtle, may help you save someone's life.
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Table of contents:
General warning signs of addiction
External signs of addiction can vary widely depending on the substance abused: people who use opioids will appear dopey and sedated while those who take stimulants can be hyperactive and anxious. But there are general warning signs of addiction that accompany many substances, signs of growing physical and psychological dependence, and the effects of drug use on personality, relationships, and health.
These warning signs include:
Changes in personality, energy levels, and appetite
Disinterest in activities they’ve previously enjoyed
Self-isolation and distancing from family members and previous friends
Increased conflict with loved ones
Falling in with a new social circle, possibly revolving around drug use
Declining performance at work or school, including frequent absences and lateness
Failing to fulfill responsibilities, from childcare to chores
Change in physical appearances, such as neglected hygiene and grooming; rapid weight loss or gain; appearing disheveled or wearing dirty clothes; not showering, shaving, or applying cosmetics as they previously would
Financial difficulties, including overspending, asking to borrow money, not paying bills on time, and even theft
Defensiveness or anger when asked about their substance use
Secrecy, lying, and unexplained absences
Lack of motivation
Irritability
Worsening symptoms of mental illness, including depression, anxiety, paranoia, obsessiveness
Possession of drug paraphernalia
Arrests and other legal troubles[1]
While the above warning signs serve as indicators of substance abuse and potential addiction, they can also serve to identify behavioral addictions or process disorders. For example, increased conflict with loved ones, failure to fulfill responsibilities, and secrecy are all signs of porn addiction.
Signs of alcohol addiction
Alcohol is the most commonly abused substance in the United States, with around 5.3% of Americans meeting the criteria for alcohol use disorder (AUD). An additional, 25.8% of American adults report binge drinking, which can easily escalate to alcoholism.[2] In fact, the normalization of binge drinking, especially among young people, may mask the development of alcoholism, meaning it's all the more important to be aware of these signs.
Signs of alcohol use disorder include symptoms of intoxication and withdrawal and the behavioral and personality changes that accompany heavy drinking. They include:
Slurred speech
Staggering, unsteady gait
Impaired coordination
Slow reaction times
Blurry vision
Sleepiness
Sexual dysfunction
Blackouts and memory loss
Mood swings
Aggression and violence
Only engaging in activities that involve alcohol
Seeming to need alcohol to have fun
Insomnia and irregular sleeping patterns
Making excuses for drinking, including that they need it to relax
Drinking at unusual times, such as early in the morning
Smell of alcohol on their breath or the scent of something used to disguise the odor, such as mints or mouthwash
Signs of hangovers: sleeping late, headaches, sensitivity to light and sound, vomiting, dizziness, irritability, and excessive thirst[3]
Signs of alcohol withdrawal: anxiety, sweating, insomnia, irritability, shakiness, hand tremors, nausea and vomiting, loss of appetite, dilated pupils, pale skin, seizures, fever, extreme agitation, and hallucinations[4]
Frequently drinking out of opaque cups or bottles, which they may claim contain water, coffee, soda, or juice
Hiding alcohol bottles throughout the house and secretly disposing of empties
Stealing alcohol from the household liquor cabinet, watering down what remains in the bottles
DUIs and legal troubles
Warning signs of opioid addiction
Opioid addiction has exploded in the US over the last 25 years, driven by lax prescribing of opioids such as oxycodone (OxyContin and Percocet), hydrocodone (Vicodin), and others. Detecting the warning signs of prescription opioid misuse in a loved one may prevent them from escalating to even riskier street opioids such as heroin and fentanyl. Read here to learn more about the warning signs of heroin use.
These warning signs include:
Sedation and sleepiness
Decrease in activity and motivation
Small pupils
Continuing to take a prescription opioid for frequently or longer than prescribed after surgery or an accident
Visiting several doctors to obtain prescriptions for opioid painkillers. Some may travel out of state to visit known pill mills where doctors write prescriptions en masse.
Stealing or borrowing medication from other people
Pretending to lose a prescription so another will be written
Dismissing non-opioid treatments for pain
Preoccupation with obtaining more opioids
Financial troubles, borrowing and stealing money
Withdrawal symptoms which may resemble the flu, including nausea, vomiting, swearing, shaking, and dilated pupils
If they’ve escalated to intravenous heroin, they may wear long sleeves to hide the signs of injection, known as track marks
Presence of drug paraphernalia, such as burnt or missing spoons or bottle caps, syringes, missing shoe laces or belts, small bags with powder residue
Overdoses: difficulty breathing, pinpoint pupils, unconsciousness[5][6][7]
Warning signs of cocaine addiction
Specific signs of cocaine addiction include:
Extreme mood swings, from the excessive confidence, chattiness, and excitability of cocaine high to the depression and fatigue of a comedown
Chronic nose bleeds, frequent runny nose and sniffing, hoarse voice
Presence of drug paraphernalia including razor blades and mirrors
White powder residue around the nose and on surfaces
Erectile dysfunction
Insomnia
Weight loss
Flat affect when not using cocaine, inability to feel pleasure
Financial difficulties due to the expense of cocaine
Paranoia and delusions[8]
Related: warning signs of cocaine addiction
Warning signs of methamphetamine addiction
Specific signs of methamphetamine (meth) abuse include:
Increased wakefulness
Decreased appetite
Weight loss
Dental problems known as “meth mouth," starting with bad breath, cavities, and swollen gums and progressing to stained, blackened, crumbling teeth and tooth loss[9]
Itching and scratching leading to skin sores
Memory loss
Insomnia
Violence and aggression
Paranoia
Hallucinations[10]
Read here for more specific details on the warning signs of meth abuse.
Warning signs of cannabis addiction
Cannabis (marijuana) has been legalized in many jurisdictions and can be safely used as a medication for pain and nausea, among other conditions. However, it’s still possible to develop a physical and psychological dependence on cannabis. Studies have estimated the prevalence of addiction—known as marijuana use disorder—among cannabis users at between 10% and 30%. Marijuana use disorder is most likely to develop when people start using the drug during adolescence.[11]
Tell-tale signs of cannabis abuse include:
Sleepiness, lack of motivation
Impaired short-term memory, making it difficult to learn and retain new information
Impaired motor skills, possibly leading to accidents and injuries
Chronic bronchitis
Paranoia
Psychosis[12]
Read here for more signs of marijuana abuse