This study is to assess the mass balance of oral ABBV-1354 in healthy adult male participants.

Inclusion Criteria:

• Male participants are eligible to participate if they agree to the following from Study Day 1 and for at least 93 days after the last dose of study treatment:
• Refrain from donating sperm

PLUS, either:

- Practice true abstinence, defined as: Refraining from heterosexual intercourse when this is in line with the preferred and usual lifestyle of the subject. Periodic abstinence (e.g., calendar, ovulation, symptothermal, post-ovulation methods) and withdrawal are not acceptable.

OR

• Use a male condom with spermicide (even with a successful vasectomy) with female partner who also uses a highly effective contraceptive method with a failure rate of < 1% per year (when used consistently and correctly).

AND

• Advise of the benefit for a female partner to use a highly effective method of contraception (as a condom may break or leak) if having sexual intercourse with a woman of childbearing potential who is not currently pregnant.
• BMI is ≥ 18.0 to ≤ 32.0 kg/m2 after rounding to the tenths decimal at Screening. BMI is calculated as weight in kg divided by the square of height measured in meters.
• 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.

Exclusion Criteria:

• History: of epilepsy, any clinically significant cardiac, respiratory (except mild asthma as a child), endocrine, metabolic, renal, hepatic, gastrointestinal, hematologic or psychiatric disease or disorder, or any uncontrolled medical illness.
• History of any clinically significant sensitivity or allergy to any medication or food.
• History of or active medical condition(s) or surgical procedure(s) that might affect gastrointestinal motility, pH, or absorption [e.g., Crohn's disease, celiac disease, gastroparesis, short bowel syndrome, gastric surgery (except pyloromyotomy for pyloric stenosis during infancy), cholecystectomy, vagotomy, bowel resection, etc.].