TRAILRUNNER-ALZ 1 is a Phase 3, randomized, double-blind, placebo-controlled study to evaluate the safety and efficacy of remternetug in participants with early symptomatic AD. Initially, 600 participants will enrollin the double-blind treatment period. Participants in the double-blind treatment period will receive remternetug or placebo administered via subcutaneous injection or intravenous infusion.~Following the 52-week main study period, participants will continue participation for up to an additional 52 weeks in an extension period. Participants who previously received remternetug will receive placebo and participants who previously received placebo will receive remternetug. Thus, all participants will receive remternetug if they complete the study.~An additional 640 participants with early Alzheimer's disease will be enrolled to an addendum safety cohort. The participants will be administered open label remternetug via subcutaneous injection or intravenous infusion. Participants enrolled into the addendum safety cohort are not eligible for the extension period.
The reason for this study is to collect safety and efficacy information regarding the study drug remternetug in participants with early Alzheimer's disease (AD).