Does Rehab Work? Treatment Success Rates and the Evidence

Yes, rehab works. Research shows addiction treatment reduces substance use, crime, and health problems while improving day-to-day functioning. There is no single "cure rate," but like other chronic conditions, recovery improves with longer treatment and ongoing care — and relapse is a manageable part of the process, not proof of failure.¹

Key takeaways

• Treatment reduces substance use and improves health and functioning.
• Success means more than abstinence — reduced use and better functioning count.
• Relapse rates (40–60%) are similar to other chronic illnesses.
• Longer treatment, medication, and aftercare improve outcomes.

Does rehab actually work?

Decades of research show that treatment helps people stop or reduce substance use and rebuild their lives. NIDA concludes that treatment is effective and that it reduces drug use, crime, and disease transmission while improving social functioning.¹

How do you measure success?

Success in addiction treatment is broader than lifelong, immediate abstinence. Clinicians also look at reduced use, fewer health and legal problems, stable housing and work, and staying engaged in care. By these measures, treatment helps the large majority of people who complete it.

What do relapse rates tell us?

Relapse is common — and that is true of every chronic condition, not just addiction. Comparing relapse rates puts it in perspective:

Condition	Estimated relapse rate
Substance use disorder	40–60%
Type 1 diabetes	30–50%
Hypertension and asthma	50–70%

These comparisons come from NIDA, which emphasizes that relapse signals a need to adjust or resume treatment — not that treatment failed.²

What makes treatment more effective?

Research consistently points to the same factors: staying in treatment long enough (often 90+ days), individualized plans, a combination of behavioral therapy and medication when appropriate, and continuing care after the main program ends.¹

Does medication-assisted treatment work?

For opioid and alcohol use disorders, medication-assisted treatment has strong evidence behind it. Medications such as methadone and buprenorphine reduce cravings, lower overdose risk, and help people stay in treatment, especially when combined with counseling.

Finding effective treatment in Delaware

The most effective program is one that matches your needs and keeps you engaged. Residential and outpatient options across the state use these evidence-based approaches — browse Delaware treatment centers to compare.

For free, confidential help any time, call the SAMHSA National Helpline at 1-800-662-4357.³ If you or someone you love is in crisis, call or text 988.