Randomized trial of intensive motivational interviewing for methamphetamine dependence

Area of Science:

• Psychiatry
• Addiction Medicine
• Clinical Psychology

Background:

• Methamphetamine dependence is a significant public health issue.
• Motivational interviewing (MI) is a common intervention for substance use disorders.
• The optimal duration and structure of MI interventions require further investigation.

Purpose of the Study:

• To compare the efficacy of an intensive, 9-session motivational interviewing (IMI) intervention with a standard, single-session MI (SMI) plus nutrition education for methamphetamine dependence.
• To assess the impact of IMI versus SMI on methamphetamine use, drug severity, and co-occurring psychiatric problems.

Main Methods:

• A randomized clinical trial involving 217 individuals with methamphetamine dependence.
• Participants received either IMI or SMI plus nutrition education, alongside standard group treatment.
• Interventions were delivered weekly over two months.

Main Results:

• Both IMI and SMI groups showed significant reductions in methamphetamine use and drug severity scores.
• No significant differences were observed between groups in reducing MA use or drug severity.
• The IMI group demonstrated significant reductions in psychiatric severity scores and psychiatric problem days, unlike the SMI group.

Conclusions:

• Standard MI (SMI) may be as effective as intensive MI (IMI) for reducing methamphetamine use and drug-related problems.
• Intensive MI (IMI) may offer additional benefits in alleviating co-occurring psychiatric issues.
• Further research is needed to determine the specific contexts and populations for which IMI is most effective.