A Study to Assess Multiple Ascending Dose, Drug-Drug Interaction, and Asian Pharmacokinetic Study of ABBV-1088

Inclusion Criteria:

• Body Mass Index (BMI) is > = 18.0 to < = 32.0 kg/m^2 after rounded to the tenthsdecimal, at Screening and upon confinement.

• A condition of general good health, based upon the results of a medical history,physical examination, vital signs, laboratory profile and a 12-lead ECG.

• Part 3 Only: Han Chinese Participant must be first-or second-generation Han Chineseof full Chinese parentage. First-generation participants will have been born inChina to two participants and four grandparents also born in China of full Chinesedescent. Second-generation participants born outside of China must have two parentsand four grandparents born in China of full Chinese descent. Participants mustmaintain a typical Chinese lifestyle, including consuming a typical Chinese diet. OR

• Japanese Participant must be first-or second-generation Japanese of full Japaneseparentage. First-generation participants will have been born in Japan to two parentsand four grandparents also born in Japan of full Japanese descent. Second-generationparticipants born outside of Japan must have two parents and four grandparents bornin Japan of full Japanese descent. All participants must maintain a typical Japaneselifestyle, including consuming a typical Japanese diet.

Exclusion Criteria:

• Part 1 (Groups 1-4), Part 2 and Part 3: History of any clinically significantneurological, respiratory (except mild asthma as a child), endocrine, metabolic,renal, hepatic, gastrointestinal, hematologic or psychiatric disease or disorder, orany uncontrolled medical illness.

• History of suicidal ideation within one year prior to study drug administration asevidenced by answering "yes" to questions 4 or 5 on the suicidal ideation portion ofthe Columbia Suicide Severity Rating Scale (C-SSRS) completed at Screening, or anyhistory of suicide attempts within the last two years.