A Study to Evaluate the Respiratory Safety of Lemborexant in Adult and Elderly Participants With Moderate to Severe Obstructive Sleep Apnea, and in Adult and Elderly Participants With Moderate to Severe Chronic Obstructive Pulmonary Disease

OSA: Lemborexant-matched oral placebo will be administered at bedtime in the clinic (within 5 minutes before lights off) or at home when not in the clinic.

OSA: 10 mg oral lemborexant will be administered at bedtime in the clinic (within 5 minutes before lights off) or at home when not in the clinic.

COPD: Lemborexant-matched oral placebo will be administered at bedtime in the clinic (within 5 minutes before lights off) or at home when not in the clinic.

COPD: 10 mg oral lemborexant will be administered at bedtime in the clinic (within 5 minutes before lights off) or at home when not in the clinic.