The National Institutes of Health (NIH), through the National Institute of Mental Health (NIMH), is inviting applications for the Early Stage Testing of Pharmacologic or Device-based Interventions for the Treatment of Mental Disorders (R61/R33 Clinical Trial Required). This funding opportunity aims to support innovative clinical trials that explore novel mechanisms of action in psychiatric treatment, emphasizing a two-phase approach where the R61 phase focuses on milestone-driven testing of target engagement, and the R33 phase extends support for comprehensive studies assessing functional outcomes and safety. The NIH plans to allocate approximately $27 million for this initiative, which is crucial for advancing scientific understanding and clinical practice in mental health. Interested applicants must submit their proposals by October 15, 2024, and can reach out to the NIH OER Webmaster at FBOWebmaster@OD.NIH.GOV for any inquiries regarding the funding announcement.