Confirmed diagnosis of Prader-Willi Syndrome due to chromosome 15 micro-deletion, maternal uniparental disomy, or imprinting defect

BMI ≥25 kg/m2

Type 2 diabetes mellitus is allowed

Subject must agree to stay at the group home or under supervision of the group home or site staff (i.e. no home visits) for the duration of the study

Stable body weight during the past 3 months, except for during home visits

An Efficacy, Safety, and Pharmacokinetics Study of Beloranib in Obese Subjects With Prader-Willi Syndrome