Drug abuse among adolescents has major negative impacts not only on themselves and families, but also whole society. Previous reseach focused more on school pupils. In addition, results in the literature on adolescents found that duration of drug use is often short and the problem of drug abuse can be more effectively treated. Hence, this study intends to investigate knowledge, attitudes, practices and coping strategies related to illcit drug use and dealers among adolescent drug offenders in correctional facilities. Focus group discussions were employed and leaded by two experienced interviewers. Interview content included several topics: cognition, attitudes, and coping towards club drugs, their first drug use history and situation, consequences of using drugs, and copings of using drugs. A total of 45 young people (10 females and 35 males) who used illicit drugs were recruited and seven focus groups were formed. Before doing content analysis, the transcripts were translated verbatim by research members who double-checked the transcript content for validity. According to discussions, this study results are that family member used drugs, perceptions of no addiction effect of club drugs, dealers offering free drugs as an effective solusion to adolescents, and consequences of using drugs were associated with use of illicit drugs. Based on our findings, we suggest (1) to enhance drug-related education so that adolescents can have more knowledge about addiction and effects of club drugs; (2) if a family member was found using drugs, this adolescent should be offered counseling to reducing the possibility of using drugs; (3) develop club drug education phamphelet to empower adolescents identifying risk situations related to the drug dealers, and practice “say NO” skills.