Quick Summary
If you are worried that someone you love is misusing opioids, the signs often show up across three areas: physical symptoms, behavioral changes, and patterns of use. This guide walks through what to look for, what the clinical diagnostic criteria actually say, and what to do next. It is meant to help you have an informed conversation, not to make a diagnosis.
Key Takeaways
- Opioid use disorder shows up across physical, behavioral, and pattern-of-use signs, not any single symptom.
- The DSM-5 lists 11 specific criteria. Meeting 2 or more in 12 months suggests an opioid use disorder, and 6 or more indicates severe.
- Pinpoint pupils, drowsiness, slowed breathing, and unexplained weight loss are common physical signs.
- Behavioral red flags include lost interest in usual activities, secrecy, and unexplained financial problems.
- Only a qualified clinician can diagnose opioid use disorder. The right next step if you are worried is an assessment.
Opioid misuse can be hard to spot in the early stages and harder to talk about. The signs are not always dramatic, and a person may be functioning well at work or school for a long time while struggling underneath. The guidance in this article comes from the National Institute on Drug Abuse and the diagnostic criteria in the DSM-5 (StatPearls summary), which clinicians use to identify opioid use disorder.
Physical Signs Worth Noticing
- Pinpoint pupils, especially in normal or bright lighting.
- Drowsiness, nodding off, or appearing sedated at odd times.
- Slowed or shallow breathing, which can be a sign of intoxication and is also an overdose risk.
- Unexplained weight loss, changes in appetite, or skipping meals.
- Track marks, bruising, or skin infections if injection is involved.
- Constipation that does not respond to usual fixes (a common opioid side effect).
- Sleep disruption in both directions: sleeping much more, or much less, than usual.
Behavioral Changes
- Withdrawing from family, friends, or activities that used to matter.
- Secrecy about whereabouts, possessions, or phone use.
- Mood swings, irritability when use is interrupted, or unusual calm right after.
- Borrowing or asking for money, items going missing, or unexplained financial problems.
- Struggles at work or school, more absences, declining performance.
- New social circles, or distance from longstanding friends.
- Multiple prescribers for pain medications, or evidence of pills being taken differently than prescribed.
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What the Clinical Criteria Actually Say
The DSM-5 defines opioid use disorder as a problematic pattern of opioid use over 12 months that meets at least 2 of 11 specific criteria. Meeting 2 to 3 indicates mild OUD, 4 to 5 moderate, and 6 or more severe. The criteria include:
- Taking opioids in larger amounts or longer than intended.
- Persistent desire or unsuccessful efforts to cut down.
- Spending significant time obtaining, using, or recovering from opioids.
- Cravings, or a strong urge to use.
- Failing to meet major responsibilities at work, school, or home.
- Continued use despite social or interpersonal problems caused by use.
- Giving up important activities because of use.
- Using in physically hazardous situations.
- Continued use despite knowing it is causing or worsening a physical or mental health problem.
- Tolerance: needing more for the same effect.
- Withdrawal: physical symptoms when use stops or is reduced.
Signs of an Overdose
An opioid overdose is a medical emergency. Signs include extreme drowsiness or unresponsiveness, very slow or stopped breathing, pinpoint pupils, blue or gray lips and fingertips, and gurgling or snoring sounds. If you suspect an overdose, call 911 immediately. If naloxone (Narcan) is available, administer it according to the package instructions while waiting for help. Naloxone is now sold over the counter and is increasingly available in pharmacies, harm reduction sites, and through local health departments.
How to Have the Conversation
If the signs are adding up, talking to your loved one is harder than it sounds. A few practical principles: choose a calm moment, not during use or argument. Lead with concern, not accusation. Be specific about what you have noticed. Avoid ultimatums in the first conversation. Offer to help with the next step, whether that is talking to a clinician, attending an assessment with them, or just being there.
The Next Step Is an Assessment
Only a qualified clinician can diagnose opioid use disorder. A brief assessment can clarify what is going on and recommend a path forward, whether that is outpatient counseling, intensive outpatient services, medication-assisted treatment, residential treatment, or some combination. The admissions team at Discovery Point Retreat can talk with you about what an assessment involves and help you think through next steps.
References
- American Psychiatric Association. DSM-5 criteria for opioid use disorder. Accessed June 8, 2026. psychiatry.org.
- National Institute on Drug Abuse. Opioids. Accessed June 8, 2026. nida.nih.gov.
- Substance Abuse and Mental Health Services Administration. Find help and treatment. Accessed June 8, 2026. samhsa.gov.
Resources
- 988 Suicide and Crisis Lifeline. Call or text 988, or chat at 988lifeline.org. Free, confidential support 24/7.
- SAMHSA National Helpline. Call 1-800-662-HELP (4357) or visit the SAMHSA National Helpline page for free, confidential referrals to local treatment.
- 911. For any medical emergency, including suspected overdose or withdrawal complications, call 911 immediately. If naloxone is available for a suspected opioid overdose, administer it according to the package instructions while waiting for help.
This article is general education and is not medical advice. It does not establish a clinician-patient relationship and is not a substitute for an individual assessment by a qualified mental health or addiction treatment professional.
