Opioid Addiction: Causes, Symptoms and Treatment Options

Opioids include legal prescription medicines for pain like oxycodone, hydrocodone and morphine, illegal opioids like heroin, and potent drugs like fentanyl and carfentanil, which have legitimate medical uses but are often illicitly manufactured for illegal use.⁵

Opioids bind to receptors in your brain that regulate pain and pleasure. Taking opioids can bring short term relief but also flood your brain's reward system, reinforcing use of opioids over time and reducing your body's production of naturally occurring endogenous opioids. With continued use, your brain adapts to the effects of having more opioids in your body and, as a result, you develop tolerance, needing more to feel the same effect, or experiencing withdrawal if you try to stop.⁶ Common withdrawal symptoms include body aches, nausea or diarrhea, sweating, anxiety, restlessness and trouble sleeping. 

For many, a short-term prescription for an opioid pain medication can lead to extended use, tolerance, and psychological and physiological dependence. When prescriptions stop, some turn to other opioids, like heroin or fentanyl, to avoid withdrawal symptoms. This pathway is not inevitable but becomes more likely the longer you use opioids and the higher the dose.⁷

The risk of transitioning from prescription use to non-medical use and opioid addiction is greatest among individuals who have another substance use disorder. Risk also increases during certain periods of exposure, such as after injuries (including sports injuries or car accidents) or following medical events like dental procedures or surgeries, when opioids are commonly prescribed. Co-occurring mental conditions and/or a history of trauma can also increase your risk. Most individuals, youth in particular, receive their first opioids from well-meaning family and friends.

Illicitly made fentanyl is now widespread. Fentanyl is up to 50 times stronger than heroin and up to 100 times stronger than morphine.¹ Even a tiny amount can result in the inability to breathe. Because it is inexpensive and extremely potent, fentanyl is often mixed into other drugs by illicit producers to stretch their supply. This creates an increased, hidden overdose risk.⁸

The opioid epidemic continues to have a devastating impact across the United States. In 2024, an estimated 79,000 people died from drug overdoses. Most fatal overdoses still involve opioids (~54,000), particularly fentanyl, which continues to drive the majority of deaths nationwide.⁹ 

The impact extends beyond overdose fatalities. More than 5 million people in the United States are living with opioid use disorder, underscoring the widespread harm the crisis continues to cause for individuals, families and communities.¹⁰ A 2025 federal analysis estimates that illicit opioids cost the United States approximately $2.7 trillion in a single year, accounting for loss of life as well as reduced quality of life, health care strain, lost productivity and criminal justice costs.¹¹ 

Yes. Fentanyl remains a leading cause of death for young adults, even as overdose fatalities have declined since peaking in 2022–2023 due to wider naloxone distribution, expanded access to treatment and other public health efforts. Among people ages 18–44, fentanyl overdoses still surpass deaths from car crashes, firearms, suicide and homicide.¹ While heart disease and cancer remain the leading causes of death overall, fentanyl's impact on young and middle adulthood remains severe and urgent.¹²

Opioid use disorder doesn't develop the same way for everyone. Factors such as how long you've used opioids, dosage, past trauma, mental health conditions and access to follow up care can all affect your risk of addiction.¹

Life experiences play a powerful role. Trauma, anxiety, depression and other mental health conditions can make you more vulnerable to addiction as they may make it harder to cope with challenging life events. Similarly, financial stress, loneliness or simply being in environments where opioids are easy to access make opioid use more likely since they represent additional sources of compounding stress. None of these factors reflect personal weakness. Instead, opioid use disorder is a complex medical condition that requires care and compassion.¹

Family history can also increase your vulnerability to developing addiction. Research suggests that genetic factors account for roughly 40-60 percent of the risk of developing OUD.¹³ Genetics don't make addiction inevitable or predict your future. Instead, having a family history of addiction highlights the value of early support, compassionate guidance and practical steps to help protect your health and well-being.¹

Clinicians diagnose opioid use disorder using criteria from the Diagnostic and Statistical Manual of Mental Disorders (DSM 5). In plain terms, OUD is diagnosed when at least two of the following occur within a 12 month period:

• Taking more opioids than you intended.
• Trying to cut back without success.
• Spending a lot of time using or recovering from use.
• Experiencing strong cravings.
• Having problems at work or home related to your use.
• Continuing to use even when it harms your health or relationships.
• Giving up activities you used to enjoy.
• Using opioids in situations where it isn't safe.
• Developing tolerance (needing more for the same effect).
• Experiencing withdrawal symptoms when opioid use stops.

Tolerance and withdrawal do not count toward diagnosis when opioids are taken exactly as prescribed under medical supervision.¹⁴

Physical dependence on opioids means your body has adapted to the drug and may experience negative withdrawal symptoms when it stops. Addiction means continued use despite harm or a sense of losing control. You can be dependent on opioids without being addicted, and both conditions can be treated safely with the right plan and support.¹

Buprenorphine is a partial mu-opioid receptor agonist, which means it activates opioid receptors enough to reduce cravings and withdrawal symptoms without producing the same euphoric effects as full opioids. It can be prescribed in office-based medical settings. Buprenorphine carries a lower risk of overdose than many other opioids and is used across inpatient and outpatient programs at Hazelden Betty Ford treatment centers, when clinically appropriate.³

Methadone is a full mu-opioid receptor agonist that has been used safely and effectively for many years to treat severe opioid use disorder. It is dispensed through certified opioid treatment programs and usually requires daily clinic visits early in care. When used as prescribed, methadone has been shown to reduce overdose risk and improve stability.⁴

Naltrexone is an opioid antagonist that blocks opioid receptors and prevents opioids from producing effects. There is no potential for misuse. Starting naltrexone requires being opioid free, typically for 7 to 10 days after detox, which can feel challenging for some people. A monthly injectable option is available.⁴ Naltrexone is used across inpatient and outpatient programs at Hazelden Betty Ford's treatment centers, when clinically appropriate.

By reducing withdrawal symptoms and easing cravings, medications for OUD helps people focus on therapy and the goals they want for their lives. Studies show medication can reduce overdose deaths by 50% or more and improve retention in care.⁵ Having medication as part of your treatment plan is not about substituting one substance for another. It is about reducing the risk of symptoms returning and strengthening your ability to stay engaged in the healing process.

Medications for opioid use disorder can be used for months or years, depending on what helps a person stay well and safe. If someone chooses to stop, the safest approach is a slow, supported taper guided by a healthcare provider, with the option to restart if needed.

Consider the use of insulin for diabetes. Medication addresses biology while guidance from your care team and support network helps you manage daily life. For some people, continuing medication long-term can be both appropriate and lifesaving.⁶

Timelines vary. Many people benefit from 30 to 90 days of intensive care followed by at least 12 months of ongoing support. Medication may continue for years or indefinitely, which is often the safest choice. You and your care team will decide together based on medical need and your personal goals.

Illicit fentanyl is present in many street drugs and counterfeit pills. Because it is up to 50 times stronger than heroin, the risk of overdose rises sharply, especially for people with reduced tolerance following detox, time in treatment, or incarceration. Carrying naloxone, avoiding using substances alone, and seeking treatment medication can lower overdose risk and promote safety. 

If opioids are affecting your health, relationships, responsibilities or peace of mind, it's worth getting an assessment. Common signs include cravings, withdrawal symptoms, taking more than intended, and struggling to cut back. An assessment is simply a conversation to help you understand what's going on and what support might help. This self-screen tool is a great place to start.

Medications like buprenorphine, methadone and reduce cravings, prevent withdrawal and/or block opioid effects. These medicines are evidence based and are considered the safest, most effective approach for many people.

If you need detox, it is done in a medically supervised setting where clinicians help you withdraw safely and as comfortably as possible. Detox prepares your body for ongoing treatment but is not treatment in itself. Medication is often introduced early to ease symptoms and reduce risk.

There are multiple levels of care. Many people begin or continue treatment in outpatient or intensive outpatient programs that fit around work, school and family responsibilities. Your care team will help match you to a level of support that fits your life and medical needs.

Choose a calm moment, share what you've noticed and express your concern with compassion. Avoid blame or labels. Offer to help with next steps such as setting up an assessment or learning about treatment options together. You don't need to have all the answers—showing care is what matters most.

"Return to use" describes any opioid use after a period of stopping. Some people think of this as a brief lapse or a longer relapse, but either way, it is not a failure. It's a sign that more support, structure, or medication may be needed. Staying connected with your care team, adjusting treatment, and leaning on recovery supports can help you regain stability quickly and safely.

Yes. Many people make multiple attempts before finding the combination of support, medication and care that works best for them. Each step teaches you more about what you need. Treatment remains effective even after setbacks, and medications significantly increase your chances of not returning to use.

Families can play a powerful role. Learning about medication, creating a safety plan that includes naloxone, attending family programming and offering steady encouragement can make treatment feel more doable. You don't have to fix everything — staying connected and informed is enough.