Causes and Risk Factors
Anyone who takes opioids can develop the disorder, but risk is higher with:- Prolonged opioid prescriptions: Weeks of around-the-clock use after surgery or injury can lead to physical dependence that evolves into loss of control.
- Personal or family history of substance use: Prior problems with alcohol, nicotine, or other drugs raise risk.
- Untreated mental health conditions: Depression, anxiety, and post-traumatic stress often accompany opioid use disorder.
- Social factors: Isolation, chronic stress, and easy access to opioids all contribute.
Signs and Symptoms
Common warning signs include:- Loss of control: Taking opioids in larger amounts or longer than intended, with unsuccessful attempts to cut down.
- Craving and preoccupation: Spending significant time obtaining, using, or recovering from opioids.
- Tolerance and withdrawal: Needing higher doses for the same effect, and experiencing muscle aches, restlessness, sweating, runny nose, diarrhea, and anxiety when doses are missed.
- Life consequences: Early refill requests, multiple prescribers, and withdrawal from family, work, or activities.
Complications
Untreated opioid use disorder can lead to overdose with slowed or stopped breathing — the most urgent danger, especially now that illicit pills are frequently contaminated with fentanyl. Injection use also spreads hepatitis B and C (see chronic hepatitis) and HIV, and can infect the heart valves. Chronic use causes severe constipation, hormonal changes, and worsening mood. Withdrawal itself is rarely dangerous but is intensely uncomfortable, and fear of it is one of the main reasons people keep using — treating withdrawal medically removes that barrier to recovery.Diagnosis
Diagnosis is made through a confidential conversation using standard medical criteria, sometimes supported by urine drug testing and blood tests to screen for hepatitis and HIV. This is a medical evaluation, not a moral judgment — the same as assessing any other chronic disease. Bringing a complete list of everything you take, including medications obtained from friends or family, allows the safest possible treatment plan.Treatment
Medication is the foundation of effective care, per the CDC's overdose-prevention guidance:- Buprenorphine: Often combined with naloxone as buprenorphine-naloxone, it relieves withdrawal and craving and can be prescribed in a regular office setting.
- Methadone: A long-acting option provided through licensed treatment programs.
- Naltrexone: A monthly injection that blocks opioid effects, started after full withdrawal.
- Naloxone rescue kits: Everyone at risk — and their households — should carry naloxone to reverse an overdose.
- Counseling and support: Behavioral therapy and peer support strengthen recovery alongside medication, and treating depression, anxiety, and chronic pain lowers the risk of relapse.