Evaluation of Safety and Efficacy of Deoxycholic Acid Injection (ATX-101) in the Reduction of Submental Fat

Inclusion Criteria: 1. Submental fat graded by the investigator as 2 or 3 using the Clinician-Reported Submental Fat Rating Scale (CR-SMFRS) as determined on Visit 2. 2. Dissatisfaction with the submental area rated by the subject as 0, 1, 2, or 3 using the Subject Self Rating Scale (SSRS). 3. Males and nonpregnant, nonlactating females between 18 and 65 years of age, inclusive on the day of randomization. Females of childbearing potential must have a negative human chorionic gonadotropin (hCG) test result within 28 days before randomization and agree to practice medically acceptable birth control during the course of the study. Medically acceptable birth control includes: surgical sterilization, hormonal contraceptives, barrier methods or an intrauterine device (IUD). 4. History of stable body weight, in the judgment of the investigator, for at least 6 months before randomization. No significant change, in the judgment of the investigator, in diet or exercise practices for at least 6 months before randomization and agreement to not change diet or exercise practices during the course of the study. 5. Expected to comply with and understand the visit schedule and all protocol-specified tests and procedures. 6. Medically able to undergo the administration of study material determined by clinical evaluations made within 56 days before and laboratory tests obtained within 28 days before randomization for which the investigator identified no clinically significant abnormality. 7. Signed informed consent obtained before any study-specific procedure is performed. Exclusion Criteria: 1. History of any intervention to treat submental fat (e.g., liposuction, surgery, or lipolytic agents) or trauma associated with the chin or neck areas, which in the judgment of the investigator may affect evaluation of safety or efficacy of treatment. 2. Loose skin in the neck or chin area for which reduction in submental fat may, in the judgment of the investigator, result in an aesthetically unacceptable outcome or a score of 4 on the Skin Laxity Rating Scale (SLRS). 3. Prominent platysmal bands at rest or other anatomical features that, in the judgment of the investigator, may interfere with the evaluation of submental fat or result in an aesthetically unacceptable outcome. 4. Evidence of any cause of enlargement in the submental area (e.g., thyroid enlargement or cervical adenopathy) other than localized submental fat. 5. Body mass index (BMI) greater than 30. 6. Currently on or considering starting a weight reduction regimen. 7. Any medical condition (e.g., respiratory, cardiovascular, hepatic, neurological disease, uncontrolled hypertension, or thyroid dysfunction) that would interfere with assessment of safety or efficacy or compromise the subject's ability to undergo study procedures or provide informed consent. 8. Treatment with radio frequency, laser procedures, chemical peels, or dermal fillers in the neck or chin area within 12 months before randomization, or botulinum toxin injections in the neck or chin area within 6 months before randomization. 9. History of sensitivity to any components of the study material or to topical or local anesthetics (e.g., lidocaine, benzocaine, or novocaine). 10. Previous randomization into this study or previous treatment with ATX-101. 11. Treatment with an investigational device or agent within 30 days of randomization.