Diagnosis of schizoaffective disorder;

Diagnosis with mental retardation;

Subject has a substance dependence disorder that has not been in sustained remission for at least 1 year;

Acute psychosis hospitalization within past 6 months;

Bipolar disorder, manic episode, dementia, obsessive-compulsive disorder, or drug-induced psychosis or current major depressive disorder;

Current clozapine treatment;

Suicidal ideation or behavior;

BMI of 39 or greater;

Relevant drug sensitivity or allergy;

Positive hepatitis or HIV test result; positive urine screen for drugs of abuse or alcohol;

Recent clinically significant illness/infection or surgery;

Recent blood product transfusion, donation or loss of 5 mL/kg of blood;

Pharmacokinetic Study of ABT-126 in Stable Subjects With Schizophrenia