The National Institutes of Health (NIH) is offering a funding opportunity titled "Integrated Functional Mapping and Molecular Profiling of Cell Ensembles Encoding the Effects of Addictive Substances in Rodents (R01 Clinical Trial Not Allowed)." This grant aims to support innovative research that utilizes scalable technologies to map and profile cell ensembles related to substance addiction across various exposure stages, including acute, chronic, withdrawal, abstinence, and relapse. The initiative seeks to fill critical gaps in understanding how neural ensembles are activated and how they influence addiction-related behaviors, ultimately contributing to the development of new interventions for substance use disorders. Interested applicants can apply for funding up to $700,000 per year, with a total funding pool of up to $2 million for 1-3 awards, and must submit their applications by February 24, 2026. For further inquiries, applicants can contact NIH Grants Information at grantsinfo@nih.gov or visit the opportunity's webpage at https://grants.nih.gov/grants/guide/rfa-files/RFA-DA-25-023.html.