This is a Small Business Sources Sought notice for market research only, not a solicitation, to identify qualified small businesses capable of performing preclinical medications discovery and abuse liability testing in rodents for NIDA’s Addiction Treatment Discovery Program. The work involves evaluating potential pharmacotherapies for substance use disorders and conducting abuse liability testing for DEA drug scheduling, requiring in-house capability for in vivo pharmacology studies and DEA registration for Schedule I-V substances. The applicable NAICS code is 541715, with a size standard of 1,000 employees, and performance will be at the contractor’s facilities. No budget amount is specified. Responses are due by June 12, 2026, at 5:00 PM Eastern Time.