Inclusion Criteria:  Males or females between 18 and 50 years of age, inclusive. Subject has body mass index (BMI) between 18.0 and 30.0 kg/m2, inclusive. Subject is in good health, as confirmed by no clinically significant findings from medical history, physical examination, 12-lead ECG, vital signs measurements, clinical laboratory evaluations, and liver function tests at Screening and Check-in. Female participants of childbearing potential must be confirmed non-pregnant and agree to use contraception. Male participants with female partners of childbearing potential must agree to use contraception. Male subjects must also not donate sperm during and for 90 days following their participation in the study. Subject is a nonsmoker (for at least 3 months) with negative urinary cotinine test at Screening and agrees to abstain from alcohol, recreational drugs (including marijuana), and tobacco or nicotine-containing products for the duration of the study. Subject is able to comprehend and is willing to sign an informed consent form and abide by the study restrictions.  Exclusion Criteria:  Subject has sustained systolic blood pressure (SBP) >150 mmHg or <90 mmHg or a diastolic blood pressure (DBP) >100 mmHg or <60 mmHg in the supine position at Screening or Day 1 of each study period, respectively. Subject has supine pulse rate of <45 beats per minute (bpm) or >100 bpm. Subject has abnormal screening ECG indicating a second- or third-degree atrioventricular block, or one or more of the following: QRS>110 msec, QTcF >450 msec for males and >470 msec for females, PR interval >200 msec. Subject has a history of risk factors for Torsades de Pointes (TdP), including unexplained syncope, diagnosis or family history of Brugada syndrome or long QT syndrome, heart failure, myocardial infarction, angina, or clinically significant abnormal laboratory assessments including hypokalemia, hypercalcemia, or hypomagnesaemia. Glomerular filtration rate (GFR) <60 mL/min at Screening. Subject has significant dermatologic findings relating to melanoma or pre-melanoma skin lesions (excluding non-invasive basal or squamous cell lesion). Subject has history or close family history (parents or siblings) of melanoma or subject history of ocular-cutaneous albinism. Subject has significant history or clinical manifestation of any metabolic, allergic, dermatological, hepatic, renal, hematological, pulmonary, cardiovascular, gastrointestinal, neurological, or psychiatric disorder (as determined by the Investigator). Subject has suicidal ideation of type 4 or 5 on the C-SSRS at Screening, a history of a suicide attempt in the last 20 years, or any suicidal behavior in the last month. Subject has participated in any clinical study with an investigational drug/device within 30 days (or 5 half-lives) prior to the first day of dosing. Subject was previously enrolled in a clinical study involving setmelanotide or any previous exposure to setmelanotide. Subject has inability to comply with QD injection regimen. Female subjects who are breastfeeding or nursing. Subject has cognitive impairment that, in the Investigator's opinion, precludes participation to the study. Subject is, in Investigator's opinion, otherwise not suitable to participate in the study.