Tangled web of drug symbols representing the challenges of addiction during opioid substitution treatment.

Beyond Heroin: Understanding the Complexities of Long-Term Recovery from Opioid Addiction

"New research reveals how continued addiction to other substances can derail opioid substitution treatment and highlights the need for comprehensive recovery strategies."


Opioid substitution treatment (OST), using medications like methadone and buprenorphine, is a cornerstone of managing opioid use disorder (OUD). OST helps to reduce illicit opioid use, prevent overdoses, and lower crime rates. However, the path to recovery isn't always straightforward, and many individuals grapple with multiple substance dependencies.

It's common for people entering treatment for OUD to have a history of using several substances. Research shows that the majority of heroin users have also used other drugs, averaging over five different substances in the months before seeking help. This creates complex challenges for long-term recovery.

A recent study published in "Drug and Alcohol Dependence" sheds light on how substance use patterns change over five years of continuous OST. By identifying different trajectories of heroin use and examining their relationship to other substances, the study offers valuable insights for improving treatment strategies and supporting sustained recovery.

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Measuring OUD and Treatment Access

The CDC defines receiving treatment for opioid use disorder (OUD) as receiving treatment for opioid use or treatment for an unspecified substance while reporting opioid use in the past year. The 2025 National Survey on Drug Use and Health, released by the Substance Abuse and Mental Health Services Administration (SAMHSA), provides nationally representative estimates on substance use disorders, mental health, and treatment among the U.S. civilian, noninstitutionalized population aged 12 or older. CDC data resources include information on opioid dispensing, naloxone, buprenorphine, and medications for opioid use disorder, helping identify treatment-access gaps and inform overdose-prevention strategies.

From Detoxification to Medical Treatment

Histories of addiction treatment describe a progression from early 19th-century detoxification facilities to modern, evidence-based care. The development of treatment is commonly presented as a shift toward recognizing addiction as a disease and using medical interventions. Historical accounts identify Dr. William Duncan Silkworth, Dr. Marie Nyswander, and Dr. Jerome Jaffe as influential figures associated with the development of the 12-step program, methadone treatment, and comprehensive national recovery efforts. Modern treatment histories also identify buprenorphine and methadone for OUD and naltrexone for opioid and alcohol dependence as examples of medication-based care.

Decoding the Trajectories: How Other Drugs Impact Opioid Addiction Treatment

Tangled web of drug symbols representing the challenges of addiction during opioid substitution treatment.

The study, a prospective observational cohort involving over 7,700 adults in England, tracked patients receiving OST with either methadone or buprenorphine for five years. Researchers analyzed data from clinical reviews conducted every six months to identify patterns (trajectories) of heroin and other drug use.

The analysis revealed distinct groups of patients based on their heroin use patterns: rapid decrease, continued low-level use, decreasing then increasing use, gradual decreasing use, and continued high-level use. These trajectories were then examined in relation to the use of other substances, including alcohol, crack cocaine, cannabis, and unspecified drugs (likely benzodiazepines).

  • Continued High-Level Heroin Use: Patients who continued to use heroin at high levels were more likely to also use crack cocaine and alcohol at high levels. They were also more prone to increasing use of unspecified drugs and less likely to reduce their cannabis use.
  • Increasing Crack Cocaine Use: For those in groups with decreasing or gradually decreasing heroin use, an increase in crack cocaine use significantly lowered their chances of successfully completing OST.
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Long-Term Treatment Patterns

The 18-20-year Australian Treatment Outcome Study examined long-term patterns of treatment use for OUD. Entering maintenance treatment at baseline predicted membership in a later treatment-trajectory group. Trajectory-group membership was associated with demographic characteristics and the use of heroin, methamphetamine, alcohol, and benzodiazepines over the 18-20-year period. Research on people with HIV seeking medication for OUD notes that access to care, treatment setting, MOUD type, research methods, and other factors may contribute to differing results, underscoring the need for further studies.

Comparing Treatment Pathways

Treatment for substance use disorders aims to stop or decrease drug use, improve health, restore normal social function, and reduce complications and relapse. Treatment options described in comparative materials include inpatient rehabilitation, outpatient programs, behavioral therapy, medication-assisted treatment, and holistic approaches. A 2020 comparative-effectiveness study examined associations between opioid use disorder treatment pathways and overdose or opioid-related acute-care use as proxies for OUD recurrence. Reviews of addiction treatment emphasize integrated approaches across substance-use and process addictions to support clinical decision-making.

These findings highlight a critical connection: long-term heroin use non-response during OST is strongly associated with high-level use of crack cocaine and alcohol. Furthermore, increasing crack cocaine use can actively sabotage the likelihood of completing long-term OST successfully.

The Bigger Picture: Implications for Treatment and Recovery

This research underscores the complex nature of opioid use disorder and highlights the importance of addressing co-occurring substance use during treatment. Simply suppressing opioid use isn't enough; a comprehensive approach is needed to tackle other dependencies that can undermine recovery efforts.

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Emerging Directions in OUD Care

A 2024 review describes OUD as a major public health threat associated with addiction, overdose, and related medical conditions. It reports that OUD has remained a relapsing and remitting disorder despite increasing knowledge of its pathophysiology and existing medical treatments, while overdose deaths have risen rather than declined. Treatment trends identified for 2026 include AI-powered care, personalized medicine, and telehealth innovations. The 2025 AMA report states that buprenorphine prescriptions increased by 83 percent and that nearly 2 million naloxone prescriptions are written each year.

Systems, Policy, and Community Impact

Addiction health services research identifies several continuing priorities: assessing how government policies affect access to care and prescription analgesics, monitoring illicit-opioid markets and manufacturing, evaluating systems of OUD care, and documenting treatment access and effectiveness. The National Academy of Medicine's Action Collaborative on Combatting Substance Use and Opioid Crises brings together more than 80 public, private, and nonprofit organizations to coordinate responses. The opioid crisis also has effects beyond individuals who use opioids, including far-reaching implications for family dynamics. Fentanyl's potency has played a particularly lethal role in the crisis.

Human-Centered Recovery Services

A Stanford d.school project developed new opioid use disorder treatment offerings for the Lummi Clinic after studying and engaging people affected by addiction. The resulting three-pronged approach focused on making opioid treatment and harm-reduction services more human-centered and accessible. CDC's Rx Awareness initiative shares stories of people whose lives were impacted by prescription opioids. Case studies from the Opioid Response Network emphasize that opioid and stimulant use disorders affect people across rural communities and urban centers and describe efforts to apply evidence-based practices to locally identified needs.

The study points to the necessity of integrated treatment strategies. These strategies should concurrently target opioid use, alcohol use, crack cocaine use, and other substance dependencies. Such comprehensive care can significantly improve the chances of successful long-term recovery.

Ultimately, recognizing OUD as a multifaceted, chronic condition is crucial. Future research should explore the interplay between substance use, employment, and housing to develop even more effective and holistic interventions that support individuals in achieving sustained recovery and improved quality of life.

Alcohol use alongside opioid treatment in other settings

  • just over one-third of clients at enrolmentIn a British prospective study, just over one-third of clients entering a community methadone clinic drank above recommended limits; the report found no statistically significant change after follow-up.[1]Caveat: no statistically significant change after 1 year of follow-up

How related research frames these patterns

A review of cannabis use in medication-based OUD treatment found that some studies reported lower opioid-use prevalence or frequency among cannabis users, while others reported higher treatment retention; the apparent dose-response relationship for retention was inconsistent. These findings describe broader research, not a direct confirmation of the heroin-trajectory comparisons here.[2]

A separate review found substantial variation in how studies measured co-occurring substance use and defined substances, making results difficult to compare across studies.[3]

Reviews also describe wide variation in outcome measures for longitudinal opioid-treatment research and no single standard measure of treatment effectiveness. That makes a successful-completion result dependent in part on how success is defined and measured.[4] [5]

Later work citing the heroin-use findings describes continued heavy heroin use during long-term opioid agonist treatment as accompanying high-level cocaine and alcohol use, but characterizes the cannabis pattern as increasing. The trajectory comparison reported here instead found a lower relative likelihood of high-and-increasing cannabis use, so those descriptions are not identical.[6] [7]

What remains uncertain about substance use and treatment outcomes

  • How would the association between increasing crack use and successful completion look under a different outcome definition, given the lack of a common measure of treatment effectiveness?[5] [7]
  • Do alcohol-use patterns change consistently during opioid agonist treatment? A review of prior studies found increases, decreases, and no change, rather than a clear pattern.[1]

About this Article -

Written with AI assistance from published research, and reviewed by the Mystum team. See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1016/j.drugalcdep.2018.11.008, Alternate LINK

Title: Change In Alcohol And Other Drug Use During Five Years Of Continuous Opioid Substitution Treatment

Subject: Pharmacology (medical)

Journal: Drug and Alcohol Dependence

Publisher: Elsevier BV

Authors: Brian Eastwood, John Strang, John Marsden

Published: 2019-01-01

Everything You Need To Know

1

What is Opioid substitution treatment (OST) and what is its purpose?

Opioid substitution treatment (OST) utilizes medications like methadone and buprenorphine to manage Opioid Use Disorder (OUD). This treatment aims to reduce illicit opioid use, prevent overdoses, and decrease crime rates, serving as a foundation for recovery. However, its effectiveness can be undermined by concurrent substance use.

2

What other substances are commonly used by individuals seeking help for Opioid Use Disorder, and why is this relevant?

Individuals often enter Opioid substitution treatment (OST) with a history of using multiple substances. Research shows that the majority of heroin users have also used other drugs, averaging over five different substances before seeking help. The concurrent use of other substances creates challenges for long-term recovery. The study examined the trajectories of heroin use and its relationship to other substances such as alcohol, crack cocaine, cannabis, and unspecified drugs, offering insights for improved treatment strategies.

3

What were the different patterns of heroin use identified in the study?

The study identified different patterns of heroin use over five years of continuous Opioid substitution treatment (OST). These included rapid decrease, continued low-level use, decreasing then increasing use, gradual decreasing use, and continued high-level use. These heroin use patterns are examined with relation to other substances such as alcohol, crack cocaine, cannabis, and unspecified drugs to determine their impact.

4

What substances were found to negatively impact Opioid substitution treatment (OST) success, and what are the implications?

The research revealed a strong link between continued high-level heroin use during Opioid substitution treatment (OST) and high-level use of crack cocaine and alcohol. This co-occurrence undermines the effectiveness of OST. Furthermore, the increase in crack cocaine use can significantly decrease the chances of successfully completing the treatment, underscoring the need to address all substance dependencies for effective recovery.

5

What does this research ultimately mean for the treatment of opioid addiction and long-term recovery?

This research underscores the complex nature of Opioid Use Disorder and emphasizes the need for comprehensive treatment approaches. Addressing co-occurring substance use alongside opioid dependency is crucial. Success in Opioid substitution treatment (OST) requires strategies that tackle all dependencies, not just the use of opioids. This comprehensive approach supports sustained recovery and helps prevent relapse.

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