Signs of opioid addiction can be difficult to recognize. Opioids may relieve pain or cause sedation, but a person’s appearance alone cannot establish opioid use disorder.
Possible concerns include difficulty controlling use, repeated early refills, missed responsibilities, or continued use despite harm. Sleepiness, mood changes, or financial problems also have other explanations.
Recurring withdrawal-like symptoms may raise concern, but need medical assessment. Our opioid addiction treatment program can be part of the discussion of concerns with individuals and families.
Why Reading the Signs Early Matters Here
Fentanyl is a major contributor to opioid-involved deaths in Massachusetts, alongside risks from other opioids and mixed drug use. Fentanyl was present in 89 percent of opioid-involved overdose deaths with a toxicology screen in 2024. Deaths did fall that year, by 37 percent, to 1,336 [1].
The decline does not eliminate overdose risk. Toxicology findings describe drugs detected in deaths, not the contents of every product in the supply.
What Opioid Addiction Is
Opioid use disorder is the clinical diagnosis for a problematic pattern of opioid use. Addiction often refers to its more severe forms. Opiates are a subset of opioids, rather than a separate diagnosis.
The Diagnostic and Statistical Manual sets out 11 criteria. They describe a problematic pattern of opioid use that causes significant impairment.
The guide on the signs of drug addiction covers the wider pattern. This chapter covers the opioid version of it.
Criteria include impaired control, craving, missed duties, risky use, and continued use despite harm. At least two applicable criteria within twelve months, with clinically significant impairment or distress, can establish opioid use disorder [2]. Tolerance and withdrawal during appropriate medical treatment do not by themselves establish it.
Opioid Dependence Is Not the Same as Addiction
Someone taking oxycodone after surgery may develop physical dependence or tolerance. The likelihood depends on dose, duration, and individual factors; neither is inevitable after every prescription.
Physical dependence is an adaptation that may cause withdrawal when use stops. Addiction involves a problematic pattern with impaired control or harm. Ongoing pain and treatment needs also require assessment.
Many of the warning signs below are signs of that seeking, not necessarily of dependence. Our chapter on is percocet addictive follows the same line through about one common prescription pill.
Physical Signs of Opioid Addiction
Prescription opioids, heroin, and fentanyl can have overlapping effects, but onset, duration, potency, and risks vary. Physical effects can occur without addiction.
Signs While Under the Influence
Very small pupils can occur with opioid exposure. They are not always present, and pupil size alone cannot identify the drug or establish addiction.
Watch also for drowsiness and nodding off mid-sentence. Speech slows or slurs, and so does breathing. Itching and scratching are common, with flushed skin, constipation, and nausea. A person may seem drunk without smelling of alcohol.
Stimulants produce the opposite picture, as the chapter on the comedown after cocaine describes.
Symptoms of Opioid Withdrawal Between Doses
Withdrawal onset varies with the opioid, formulation, and use pattern. It can begin within hours with short-acting opioids and later with longer-acting ones.
The opioid withdrawal symptoms are yawning, runny nose, watery eyes, sweating, and goosebumps. Then come muscle aches, muscle cramps, stomach cramps, diarrhea, vomiting, anxiety, and sleeplessness.
Repeated flu-like symptoms that improve after another dose may suggest withdrawal, but infections and other illnesses need consideration. A sudden improvement does not prove drug use. Ask about symptoms and seek a clinical assessment.
Longer Term Physical Changes
Over months, look for weight loss, poor hygiene, dental problems, and lost interest in old hobbies. Sleeping patterns flip, so the person is awake at night and asleep in the afternoon.
If the person injects, look for track marks or bruises on arms, hands, feet, or neck. If they smoke fentanyl, look for burns on fingers or lips.
Behavioral Signs of Opioid Addiction
There is no fixed order in which physical and behavioral changes appear. Families may notice different concerns at different times.
Around Prescriptions
Mayo Clinic lists the patterns that point toward a problem with prescription opioids. The person takes the medicine in a way the prescriber did not intend, or takes it just in case when not in pain [3].
- Daily activities organize around getting it. Pills get borrowed, or reported lost to get more prescriptions written.
- Visiting multiple doctors for the same prescription is on the list too. So is making poor decisions that put the person or others in danger.
- Massachusetts’ prescription monitoring program can help clinicians identify overlapping prescriptions. It does not guarantee that prescription seeking stops or predict that someone will move to illicit drugs.
Some people also use other substances with opioid-like effects. The chapter on a product that acts on the same receptors discusses kratom, whose legal status and risks vary.
Around Money, Time, and People
Money goes missing, or the person asks to borrow it with shifting explanations, and valuables disappear. Financial distress follows.
Time becomes unaccounted for. Errands run long, and answers stay vague.
Old friends fade, and new ones appear, never introduced. Work performance drops, or the job goes.
New secrecy or defensiveness can raise concern when accompanied by other harms. Even several signs together do not prove opioid use or addiction.
How to Tell When You Are Not Sure
- Look for a pattern and context rather than treating a particular number of lost prescriptions as diagnostic. Repeated problems warrant discussion with the clinician.
- Compare the person to their own baseline. Risk factors such as chronic pain or a past substance use disorder raise the odds.
- Notice what goes missing: prescription medications from the cabinet, spoons, cotton, cash.
Then talk, without an accusation and without waiting for certainty. Mayo Clinic’s advice is not to wait to be asked, and to involve the person’s clinician early.
Emotional and Psychological Signs of Opioid Addiction
Opioid use or withdrawal can affect mood, but responses vary. Mood swings, irritability, or sedation can also have other causes.
Mayo Clinic names those mood swings, from joy to anger, among the warning signs. Deep depression, hopelessness, and social withdrawal are common. So are co-occurring disorders. Anxiety, post-traumatic stress disorder, and other mental health conditions often predate the opioids.
Other medicines may be prescribed alongside opioids and can add risks. The chapter on is gabapentin addictive discusses one example.
Suicidal thoughts are more common in people with opioid use disorder than in the general population. Take any mention at face value. The 988 Suicide and Crisis Lifeline takes calls and texts at any hour.
Signs of Fentanyl Addiction Specifically
Fentanyl follows the opioid pattern with a few differences.
- The National Institute on Drug Abuse puts fentanyl at about 50 to 100 times more potent than morphine, and says a lethal dose can be very small [4]. Overdose risk is there with the first pill and the fiftieth.
- Repeated fentanyl use can cause dependence and withdrawal between doses. Timing varies; outward signs cannot reliably distinguish fentanyl from another opioid.
- Fentanyl may be present in counterfeit pills sold as prescription medicines [4]. A tablet’s appearance cannot establish its ingredients or safety.
The chapter on whether Adderall is habit-forming covers what a real prescription stimulant does.
Drug-use materials may raise concern, but none can identify a substance reliably. Counterfeit pills can look convincingly pharmaceutical, so imperfect stamping is not a dependable test.
Poorly healing wounds can be associated with xylazine exposure, but have other causes and need medical care. Massachusetts reported xylazine in 22 percent of screened opioid-involved overdose deaths in 2024 [1].
Recognizing an Opioid Overdose
Every family that suspects opioid use should keep naloxone in the house.
- Suspected opioid overdose may involve unresponsiveness and slow or absent breathing, sometimes with small pupils, gurgling sounds, or a limp body [5]. Do not wait for every sign before calling 911.
- Skin turns pale, blue, or cold. The heartbeat goes faint, and lips and fingernails turn purple.
- Call 911 immediately and give naloxone if available. If normal breathing has not returned after two to three minutes, repeat according to the product instructions. Follow the dispatcher’s CPR instructions if the person is not breathing normally. If unconscious but breathing normally, place them on their side. Stay until help arrives.
Naloxone is available without a prescription. Massachusetts’ Good Samaritan law offers limited protection for good-faith requests for overdose help, but does not protect every offense [6]. It also reverses an overdose only temporarily, and it can wear off before the opioid does. That is why the 911 call matters as much as the dose.
Naloxone does not reverse xylazine, but should still be given when opioid exposure is possible. Persistent sedation or abnormal breathing needs emergency care even after naloxone.
What to Do Once You Recognize the Signs
Clinical Assessment and Withdrawal Care
Opioid withdrawal can be intensely distressing and sometimes cause serious complications. A clinician should assess withdrawal, other substances, medical conditions, and the safest treatment plan.
Tolerance can decrease after a break. Returning to a previous dose may cause a fatal overdose. Continuing care and overdose prevention are essential. Mixing opioids with alcohol raises overdose risk sharply. That pairing turns up often.
New Wave does not provide detox, but our drug and alcohol detox page explains how the referral to a Massachusetts acute treatment services program works. Assessment can also identify withdrawal risks from alcohol, benzodiazepines, or other drugs. Inpatient detox is not required for everyone with opioid use disorder.
Medication, Therapy, and When to Seek Professional Help
Three medications are approved for opioid use disorder: methadone, buprenorphine, and naltrexone.
Medicines for opioid use disorder are associated with reduced overdose and overall mortality. Detoxification alone is not recommended as treatment because return-to-use and overdose risks remain [7]. Some people begin ongoing medication treatment without a separate detox admission. Others need medically managed withdrawal. Outpatient, residential, or hospital care should fit the individual’s needs.
Day treatment, intensive outpatient care, and weekly visits are options, rather than a mandatory sequence. Medication can continue as long as clinically appropriate. Therapy, family support, and other services can help; medication should not be withheld simply because someone cannot participate in counseling [7].
Frequently Asked Questions About the Signs of Opioid Addiction
What Are the Early Warning Signs of Opioid Addiction?
Possible warning signs include impaired control, repeated early refills, or continued use despite harm. Small pupils, drowsiness, or withdrawal-like symptoms can prompt assessment, but do not prove addiction or always appear first.
What Are the Signs of Fentanyl Addiction?
Fentanyl can cause the same intoxication, dependence, and overdose signs as other opioids. Symptoms, materials, and pill appearance cannot reliably identify fentanyl. Poorly healing wounds need assessment and do not by themselves prove xylazine exposure.
Is Opioid Withdrawal Dangerous?
Opioid withdrawal is usually not fatal in otherwise healthy adults, but vomiting, diarrhea, pregnancy, and medical or mental health conditions can create serious risks. Reduced tolerance also increases overdose risk if use resumes. Seek clinical guidance.
Can Someone Be Addicted While Taking Opioids as Prescribed?
Addiction can develop in someone with a legitimate prescription. Tolerance and withdrawal during appropriate treatment do not by themselves establish opioid use disorder; clinicians assess impaired control, distress, and other applicable criteria. Staying within the prescribed dose does not replace that assessment.
Where to Start
If you recognize these signs in someone you love, get naloxone into the house today. Then make the call.
The Massachusetts Substance Use Helpline at 800-327-5050 offers free, confidential guidance and referrals around the clock. It can help locate treatment, but cannot guarantee an available detox bed. Text HOPE to 800327.
The Substance Abuse and Mental Health Services Administration runs a national helpline at 1-800-662-HELP, or 4357. It is free and confidential too. Our Opioid addiction treatment program at New Wave Recovery Center offers medication support, outpatient care, and a family program. It is built for the people who noticed first.
This article is for information only. It is not a substitute for medical advice, diagnosis, or treatment. If someone may be overdosing, give naloxone if available and call 911. If you or someone you know is thinking about suicide, call or text 988.
Sources
- Massachusetts Department of Public Health. Massachusetts 2024 Opioid-Involved Overdose Report: Data, Trends, and Action. https://www.mass.gov/doc/massachusetts-2024-opioid-involved-overdose-report-0/download
- Cleveland Clinic. Opioid Use Disorder (OUD). Last updated July 22, 2025. https://my.clevelandclinic.org/health/diseases/24257-opioid-use-disorder-oud
- Mayo Clinic. How to tell if a loved one is abusing opioids. January 19, 2024. https://www.mayoclinic.org/diseases-conditions/prescription-drug-abuse/in-depth/how-to-tell-if-a-loved-one-is-abusing-opioids/art-20386038
- National Institute on Drug Abuse. Fentanyl. https://nida.nih.gov/research-topics/fentanyl
- MedlinePlus, National Library of Medicine. Opioid Overdose. Last updated March 25, 2024. https://medlineplus.gov/opioidoverdose.html
- Massachusetts General Laws, Chapter 94C, Section 34A. Overdose-related immunity. https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXV/Chapter94C/Section34A
- Centers for Disease Control and Prevention. Opioid Use Disorder: Treating. https://www.cdc.gov/overdose-prevention/hcp/clinical-care/opioid-use-disorder-treating.html