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Efficacy and Safety Trial of Verubecestat (MK-8931) in Participants With Prodromal Alzheimer's Disease (MK-8931-019) — APECS  

Alzheimer's Disease Clinical Trial

Official title:
A Phase III, Randomized, Placebo-Controlled, Parallel-Group, Double-Blind Clinical Trial to Study the Efficacy and Safety of MK-8931 (SCH 900931) in Subjects With Amnestic Mild Cognitive Impairment Due to Alzheimer's Disease (Prodromal AD)

Clinical Trial Summary

This study consists of two parts, Part 1 and Part 2. Part 1 assesses the efficacy and safety of verubecestat (MK-8931) compared with placebo administered for 104 weeks in the treatment of amnestic mild cognitive impairment (aMCI) due to Alzheimer's Disease (AD), also known as prodromal AD. Participants are randomized to receive placebo, or 12 mg or 40 mg verubecestat, once daily. The primary study hypothesis for Part 1 is that ≥1 verubecestat dose is superior to placebo with respect to the change from baseline in the Clinical Dementia Rating scale-Sum of Boxes (CDR-SB) score at 104 weeks. Participants completing Part 1 may choose to participate in Part 2, which is a long term double-blind extension to assess efficacy and safety of verubecestat administered for up to an additional 260 weeks. In Part 2, all participants receive either 12 mg or 40 mg verubecestat, once daily.

Clinical Trial Description

As a result of protocol amendment, Study Part 2 will contain a Positron Emission Tomography (PET) imaging substudy to assess regional neurofibrillary tangle (NFT) expression. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT01953601
Study type Interventional
Source Merck Sharp & Dohme Corp.
Contact
Status Terminated
Phase Phase 3
Start date November 5, 2013
Completion date April 17, 2018
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