Annovis Bio Initiates Pivotal Phase 3 Study for Buntanetap in Early Alzheimer's Disease

ANVS
October 05, 2025

Annovis Bio Inc. announced on February 5, 2025, that the first two patients have been entered into the pivotal Phase 3 study evaluating buntanetap in early Alzheimer's disease (AD). This marks a significant milestone in advancing buntanetap toward market approval. The study is a randomized, placebo-controlled, double-blind trial designed to assess the safety and efficacy of a daily dose of buntanetap.

The treatment period will last for 18 months, comprising a 6-month assessment of symptomatic effects followed by an additional 12-month evaluation of buntanetap’s potential disease-modifying effects. This Phase 3 protocol received FDA approval following positive data from previous Phase 2/3 trials, which demonstrated significant cognitive improvement in a subgroup of early AD patients and showed no safety concerns.

The company anticipates enrolling over 750 participants across approximately 100 sites in the United States. The initial 6-month portion of the study is funded by the recently completed $21 million public offering, with the 12-month phase expected to be supported by additional capital from warrant exercises. This initiation brings hope for a new Alzheimer's treatment.

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