Section 94C:24 - Dispensing controlled substances to research subject or patient; harmful quantities from more than one source; notification of practitioners(a) If the commissioner determines that a research subject or patient is receiving a controlled substance from more than one source and in quantities which he determines to be harmful to the health of such research subject or patient, said commissioner shall so notify the practitioners who have dispensed the controlled substance.(b) In order to prevent the dispensing of controlled substances to the same individual from multiple sources or the unlawful diversion of controlled substances, the commissioner shall, pursuant to the provisions of chapter 30A, adopt rules and regulations for carrying out the provisions of this section.Mass. Gen. Laws ch. 94C, § 24