The National Institutes of Health (NIH), through the National Institute on Drug Abuse (NIDA), has announced a funding opportunity titled "Mechanistic Research on Neuromodulation for Substance Use Disorders Treatment" (R61/R33 Basic Experimental Studies with Humans Required). This initiative aims to encourage exploratory and developmental research focused on identifying and validating novel targets for non-invasive brain stimulation (NIBS) and understanding the neurobiological and cognitive responses that precede clinical outcomes such as reduced cravings or substance use. The funding is critical for advancing innovative methodologies in substance use disorder (SUD) research, with a maximum award of $600,000 available for the R61 phase over two years, and applications are due by August 14, 2026. For further inquiries, interested 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-24-034.html.