Long-Term Extension Study of Intepirdine (RVT-101) in Subjects With Dementia With Lewy Bodies: HEADWAY-DLB Extension

This 6-month, double-blind,extension study will provide further information regarding the long-term safety and tolerability of intepirdine (RVT-101) in subjects with DLB who have participated in the double-blind, placebo-controlled, lead-in study RVT-101-2001. The study duration for subjects in study centers in the USA will be 12 months. Subjects who were randomized to the RVT-101 35-mg and RVT-101 70-mg treatment groups in lead-in study RVT-101-2001 will remain in the same treatment groups for this study; subjects who were randomized to the placebo treatment group in the lead-in study will be assigned to the RVT-101 70-mg treatment group in this study. Various background therapies, including acetylcholinesterase inhibitors and memantine, will be allowed.