This research addresses the critical challenge of adolescent substance abuse by developing and evaluating an Islamic-based group guidance and counseling model. Utilizing a Research and Development (R&D) methodology, the study focuses on students at an Islamic senior secondary school in Indonesia to bridge the gap between conventional counseling and faith-integrated interventions. The developed model incorporates twelve core components including rationale, Islamic-based materials, and structured implementation stages grounded in the principles of taqwa (moral consciousness) and tazkiyatun nafs (self-purification). The intervention was tested using a quasi-experimental pretest-posttest control group design involving eleventh-grade students. Quantitative analysis revealed a significant transformative impact; baseline self-prevention levels rose from an initial average of 63.9% to 84.2% following the intervention, representing a robust 20.3% increase. Statistical validation through a paired t-test confirmed the model’s effectiveness with a value of 10.912 (p < .001). The findings suggest that integrating Quranic values and ethical reflection into group dynamics creates a moral shield, fostering internalized self-regulation and spiritual resilience against negative peer influences. This research provides a scientifically validated and spiritually responsive framework for school counselors to effectively prevent narcotics, psychotropic, and addictive substances abuse.
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