The National Institutes of Health (NIH) is inviting applications for a funding opportunity titled "Seamless Early-Stage Clinical Drug Development (Phase 1 to 2a) for Novel Therapeutic Agents for the Spectrum of Alzheimer's Disease (AD) and AD-related Dementias (ADRD)." This initiative aims to support the early evaluation of promising pharmacological interventions that target non-amyloid/non-tau mechanisms to address cognitive and neuropsychiatric symptoms across the Alzheimer's spectrum, combining Phase 1 clinical trials with Phase 1b/Phase 2a trials under a UG3/UH3 phased award mechanism. With the prevalence of Alzheimer's projected to exceed 12 million Americans by 2050, this funding opportunity is crucial for advancing clinical research and addressing the significant economic burdens associated with the disease. Interested applicants must submit their proposals by January 19, 2024, and can direct inquiries to NIH Grants Information at grantsinfo@nih.gov for further details.