Single episode of heavy drinking two weeks ago indicates a relapse that significantly undermines prior treatment progress

Relapse during active treatment is a marker of treatment failure in substance use disorders and should prompt immediate reevaluation of the treatment modality, with consideration of transitioning to a more structured approach such as cognitive behavioral relapse prevention therapy. The AUDIT score reduction, while notable, cannot be considered meaningful if the patient continues to engage in any episodes of heavy drinking during the treatment course. The PMHNP should evaluate this as an incomplete response requiring a fundamental change in the treatment strategy rather than continuation of motivational interviewing. This response applies an unrealistic abstinence-only framework to evaluate treatment progress and mischaracterizes a single episode of heavy drinking as treatment failure.

The patient's outcomes suggest that motivational interviewing has been effective for building initial motivation but has reached its therapeutic ceiling

The transition to a more action-oriented therapeutic modality is now indicated to consolidate the behavioral gains. Motivational interviewing is designed as a brief intervention typically spanning four to six sessions, and continuing it beyond 10 weeks risks dependency on the therapeutic relationship and delays the development of independent coping skills. The appropriate evaluation-informed next step is to transition the patient to cognitive behavioral therapy, which provides structured relapse prevention strategies and skills training better suited to the action stage of change. The PMHNP should evaluate the motivational interviewing as successfully completed and plan the transition to the next phase of treatment within the next two to three sessions.

AUDIT score reduction from 32 to 14 is the most clinically meaningful outcome measure demonstrating treatment effectiveness regardless of the single drinking episode

However, the score of 14 still falls in the hazardous drinking range, indicating the patient has not yet achieved the treatment goal of moving below the clinical threshold of 8. The PMHNP should evaluate the motivational interviewing as partially effective and supplement it with pharmacological intervention such as naltrexone or acamprosate to accelerate the reduction in drinking and prevent further heavy drinking episodes. The stage-of-change framework is a theoretical construct that is less useful for outcome measurement than standardized validated instruments like the AUDIT. While the AUDIT score is a valuable outcome measure, this response overemphasizes a single metric at the expense of the broader clinical picture.

The motivational interviewing sessions have been effective as measured by the patient's advancement from the contemplation stage to the action stage of change

This is the primary targeted outcome of this therapeutic modality. The patient's progression from daily heavy drinking to weekend-only moderate use, his voluntary engagement with mutual support groups, and his expressed commitment to abstinence to his family all demonstrate meaningful behavioral and motivational shifts consistent with successful motivational interviewing. The AUDIT score reduction from 32 to 14 provides quantitative evidence of decreased alcohol-related harm, and a single episode of heavy drinking in the context of an identifiable stressor is consistent with expected non-linear recovery and does not represent treatment failure.