Family-based prevention programs aim to prevent youth from falling victim to substance abuse issues by focusing on what families can offer. This study attempts to evaluate the effectiveness of the Family on Alert (FoA) program conducted by NADA. A qualitative method was utilized involving focus group discussions with key informants from NADA in the state of Selangor, Kedah, Johor, Sabah, and the Federal Territory of Kuala Lumpur. NVivo software was used to analyze the qualitative data. Generally, the FoA program implemented by NADA has positively impacted the participants, particularly in increasing the awareness, knowledge, and attitude among parents in preventing drug abuse among adolescents in Malaysia.