Stopped for futility. Phase 3 studies not likely to meet primary endpoints.

The purpose of the study is to determine whether lanabecestat can be safely prescribed in participants with kidney impairment without a dose adjustment.

Participants will be on study for up to 6 weeks; this includes a 2-week screening and a follow-up about 10 days after final drug administration.

Inclusion Criteria:

- Have a body mass index (BMI) of 19 to 40 kilograms per meter square (kg/m²)

Exclusion Criteria:

• Have a history of or current significant ophthalmic disease, particularly any eye problem involving the retina
• Have moderate or severe vitiligo or any other clinically significant disorder of skin or hair pigmentation
• Have acute unstable neuropsychiatric disease
• Have active or uncontrolled neurologic disease, or clinically significant head injury