The objective of this study was to determine the mandatory requirements for the investigation of drug-related crimes imposed by the age category of the accused. The study involved the following methods: information analysis, systemic approach, descriptive analysis, pragmatic approach and prognosis. It was concluded that tactical techniques, stages, investigative situations in the investigation of juvenile drug-related crimes are used in the same cases and in the same order as in relation to other categories of crimes. It is indicated that the following mandatory requirements to be met during the investigation of juvenile drug-related crimes: 1) establishment of all necessary circumstances of the case of this category; 2) ensuring mandatory participation of an expert in forensic psychology at all stages of the investigation; 3) ensuring mandatory participation at all stages of the investigation of parents or other legal representatives of the minor, representatives of the Children's Service and juvenile police; 4) ensuring psychological and informational safety of the minor; 5) ensuring the most humane and tolerant attitude towards juvenile offenders.