Annovis Announces Open-Label Extension Study for Parkinson's Disease Patients

Core Viewpoint - Annovis Bio, Inc. is set to launch an Open-Label Extension (OLE) study in January 2026 to assess the long-term safety and efficacy of its drug, buntanetap, in patients with Parkinson's disease [2][3] Study Overview - The OLE study aims to enroll 500 patients over a 36-month treatment period, with participants receiving a once-daily dose of 30mg oral buntanetap [9] - The study will include two cohorts: former participants of previous clinical trials and patients who have been receiving deep brain stimulation (DBS) for at least 12 months [9][10] Objectives and Methodology - The study will evaluate treatment persistence by examining how patient outcomes evolve after discontinuing treatment, providing insights into the long-term effects of buntanetap [5][6] - It will also assess patient responses when treatment is reintroduced, offering a comprehensive view of the drug's effects and durability [6] Addressing Underserved Populations - The inclusion of patients receiving DBS aims to address a gap in clinical research, as this population is often excluded due to complications in outcome assessments [8][10] - The study seeks to evaluate the interaction between buntanetap and DBS, potentially providing additional therapeutic benefits [7][10] Regulatory Advancement - The OLE study is a critical step toward a future New Drug Application (NDA) submission, helping the company meet FDA patient exposure requirements [11] - The study aims to ensure a total of approximately 1,500 treated patients, with specific targets for treatment duration and dosage [11]