Pharmacokinetics of Suvorexant in Participants With Hepatic Insufficiency (MK-4305-017)

Inclusion Criteria for Hepatic Insufficiency Participants: * Females of reproductive potential must have a negative pregnancy test and agree to use (and/or have their partner use) two acceptable methods of birth control * Body Mass Index (BMI) ≤35 kg/m\^2 prior to start of study * Diagnosis of stable hepatic insufficiency * Smoking is restricted to ≤10 cigarettes per day Inclusion Criteria for Healthy Matched Participants: * Females of reproductive potential must have a negative pregnancy test and agree to use (and/or have their partner use) two acceptable methods of birth control * BMI within approximately 20% of that of his/her hepatic participant * Participant is healthy * Participant is matched by race, gender, age (+/- 5 yrs) to his/her hepatic participant enrolled in the study * Smoking is restricted to ≤10 cigarettes per day Exclusion Criteria for Hepatic Insufficiency Participants: * Participant is mentally or legally incapacitated * History of a clinically significant psychiatric disorder over the last 5 to 10 years * Participant has a history of any illness not related to his/her hepatic insufficiency * History of a persistent sleep abnormality occurring for at least three (3) months * Participant has a history of stroke, chronic seizures, or major neurological disorder * History of clinically significant hematological, immunological, renal, respiratory, or genitourinary abnormalities, uncomplicated kidney stones or childhood asthma * History of cancer * History of cataplexy * Participant is a nursing mother * Participant consumes \>3 servings of alcohol a day * Participant consumes \>6 caffeine servings a day * History of multiple and/or severe allergies * Participant is currently using or has history of illegal drug use * Participant has traveled across 3 or more time zones within 2 weeks of study participation * Participant works a night shift and is not able to avoid night shift work within 1 week before each treatment visit Exclusion Criteria for Healthy Matched Participants: * Participant is mentally or legally incapacitated. History of a clinically significant psychiatric disorder over the last 5 to 10 years. * Participant has a history of any illness * History of a persistent sleep abnormality occurring for at least three (3) months * Participant has a history of stroke, chronic seizures, or major neurological disorder * History of clinically significant endocrine, gastrointestinal, cardiovascular, hematological, immunological, renal, respiratory, or genitourinary abnormalities, uncomplicated kidney stones or childhood asthma * History of cancer * History of cataplexy * Participant is a nursing mother * Participant consumes \>3 servings of alcohol a day * Participant consumes \>6 caffeine servings a day * History of multiple and/or severe allergies * Participant is currently using or has history of illegal drug use * Participant has a history of any chronic and/or active hepatic disease * Participant has traveled across 3 or more time zones within 2 weeks of study participation * Participant works a night shift and is not able to avoid night shift work within 1 week before each treatment visit