The National Institutes of Health (NIH) is offering a funding opportunity titled "Mechanism for Time-Sensitive Substance Use Research" under the National Institute on Drug Abuse (NIDA). This grant, designated as R21, aims to support pilot, feasibility, and exploratory research addressing urgent issues in substance use epidemiology and health services, particularly in response to sudden increases in substance misuse and emerging public health challenges. Eligible applicants include a wide range of entities such as educational institutions, governmental bodies, and nonprofit organizations, with a budget cap of $275,000 over two years. Interested parties must submit their applications by September 9, 2027, and can direct inquiries to grantsinfo@nih.gov for further information.