The National Institutes of Health (NIH), through the National Institute on Drug Abuse (NIDA), is offering a funding opportunity for the development of medications aimed at preventing and treating substance use disorders (SUDs) and overdose. This initiative is structured into two phases: the UG3 phase focuses on achieving specific milestones within a two-year period, while the UH3 phase extends support for an additional three years for projects that successfully meet the UG3 milestones. Given the urgent need for effective treatments in light of rising overdose deaths, particularly from synthetic opioids and stimulants, this funding opportunity emphasizes innovative research methodologies and the effective application of existing medications. Interested applicants can seek funding of up to $3 million annually for a maximum of five years, with applications due by August 11, 2025. For further inquiries, contact NIH Grants Information at grantsinfo@nih.gov or visit the additional information link at https://grants.nih.gov/grants/guide/pa-files/PAR-25-329.html.