Motivational Enhancement Therapy for Substance Use Disorders
For individuals with ambivalence about changing their substance use behavior, use motivational interviewing (MI) principles to help patients generate their own arguments for change rather than confronting them, as confrontation decreases motivation and is usually unsuccessful. 1
Core Principles of Motivational Enhancement Therapy
The fundamental approach centers on three key strategies that directly address patient ambivalence:
- Resist the "righting reflex" – avoid telling patients what to do, as this generates resistance; instead, help them articulate their own reasons for change 1
- Understand the patient's personal motivations – patients change for reasons they value highly, not reasons imposed by clinicians 1
- Listen actively to elicit the patient's own path to behavior change rather than prescribing one 1
Specific Techniques for Ambivalent Patients
Communication Strategies
- Use the "elicit-provide-elicit" technique as a nonconfrontational approach to giving advice that allows patients to express feelings about change and helps assess readiness 1
- Employ decision analysis ("pros and cons") to help patients articulate advantages and disadvantages of changing their behavior 1
- Use reflective listening to identify and mirror back statements the patient makes supporting change, highlighting their own reasons 1
- Provide affirmations to promote self-efficacy, as most patients with substance use disorders experience guilt and shame that undermines confidence in their ability to change 1
Practical Implementation
MI demonstrates significant effectiveness when compared to no intervention, with the strongest effect immediately post-intervention (SMD 0.79) and sustained but weaker effects at short-term follow-up (SMD 0.17). 2 More recent evidence confirms MI may reduce substance use compared to no intervention up to short follow-up periods. 3
- Deliver MI in brief formats – as few as one to two individual sessions can be effective, with session durations ranging from 10 minutes to longer encounters depending on setting 1, 3
- Combine with other evidence-based approaches when appropriate – MI works particularly well as a standalone intervention or integrated with Screening, Brief Intervention, and Referral to Treatment (SBIRT) 1
- Target patients with lower baseline motivation specifically – MET produces better outcomes for patients with low initial motivation to change compared to those already highly motivated 4
Managing Specific Clinical Scenarios
For Substance Abuse (Not Yet Dependence)
- Advise abstinence as the primary goal but be prepared to offer harm reduction strategies for patients not committed to abstinence 1
- Anticipate defensive reactions, ambivalence, guilt, shame, and lack of concern about substance use when approaching these patients 1
- Frame harm reduction as an appropriate intermediate goal – examples include providing clean needles or avoiding driving while intoxicated 1
For Substance Dependence
- Use brief MI counseling to facilitate entry into more intensive treatment programs, engagement with mutual help meetings, or agreement to pharmacotherapy trials 1
- Recognize that substance dependence requires a longitudinal chronic care approach that extends beyond brief MI alone, including pharmacotherapy, specialty treatment referral, and ongoing care coordination 1
Integration with Other Treatments
When MI alone is insufficient, combine with cognitive-behavioral therapy (CBT) or contingency management (CM), as these behavioral therapies demonstrate the most successful outcomes in reducing substance use. 1
- For alcohol use disorder specifically, integrate MI with pharmacotherapy using the FRAMES model: Feedback, Responsibility, Advice, Menu of options, Empathy, Self-efficacy 5
- For cocaine and amphetamine addiction, consider that contingency management plus community reinforcement approach represents the reference standard treatment 1
Common Pitfalls to Avoid
- Do not confront or push patients to change – this natural physician reflex generates resistance and decreases motivation 1
- Do not restrict MI to highly motivated patients – paradoxically, patients with lower initial motivation benefit more from MET than those already highly motivated 4
- Do not use MI as the sole intervention for substance dependence – these patients require more comprehensive longitudinal care including pharmacotherapy and specialty referral 1
- Do not assume brief intervention alone suffices – while MI shows post-intervention effects, these weaken over time, and medium to long-term outcomes often require additional interventions 2, 3