An Open-Label Pilot Trial of Alpha Lipoic Acid (ALA) for Weight Loss in Schizophrenia

Design: This is a ten week open-label, fixed dose clinical study of alpha lipoic acid (ALA) for the treatment of antipsychotic weight gain in outpatients with schizophrenia or schizoaffective disorder.

Study Endpoints: The primary outcome measure is change in body weight from baseline. Secondary outcome measures are fasting serum glucose, glycosylated hemoglobin, insulin, LDL cholesterol, triglyceride levels, quality of life (Q-LES-Q), Clinical Global Impression (CGI) scores and performance on the The Brief Assessment of Cognition in Schizophrenia neurocognitive battery (BACS). (after preliminary analysis, we have changed the cognitive assessment to the DSST task only. The investigators are also going to conduct exploratory analyses of food craving, food preference and food frequency.

Subjects: Subjects will be recruited from the Psychosis Program and clinician referrals from other teams at the CMHC. Based on our previous weight loss studies the investigators expect very high enthusiasm from the subjects.

Procedure and assessment schedule: Subjects who meet the inclusion/exclusion criteria will participate in a multi-step screening process where demographic information will be gathered, weight and BMI will be measured and fasting blood will be taken, and if you are a female, a urine sample will be tested for pregnancy. If lab results are adequate, the subject will continue on to a baseline visit where they will start taking alpha lipoic acid (ALA) at 600mg three times a day (1800mg total) for a total of ten weeks. At each visit, weight will be obtained, scheduled blood will be drawn and study ratings will be conducted. A short visit with the physician every two weeks ensures safety and improves rating fidelity. Medication compliance will be ensured with pill counts, feedback and encouragement that is standard for clinical trials with schizophrenia patients. Research scales are standard schizophrenia and food scales.

Inclusion criteria

• Age 18 to 70 years;
• Meet DSM-IV criteria for schizophrenia or schizoaffective disorder (confirmed from clinical chart)
• Overweight, as defined with a BMI of equal to or greater than 27 kg/m²;
• Be on a stable dose of antipsychotic medication; i.e. at least one month with no dosage change, and two months from an antipsychotic switch;
• Deemed to be symptomatically stable by the clinical staff in the last two months;

• English speaking

Exclusion criteria

• A history of dementia, mental retardation or other neurological disorder that may interfere with study ratings;
• Not capable of giving informed consent for participation in this study;
• Ongoing pregnancy;
• A medical disorder that is known to cause obesity