Conditions: Schizophrenia
Keywords: Schizoaffective Disorder
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 21
Healthy volunteers: no

Brief summary:
This study will compare the safety and effectiveness of three different antipsychotic medications, as well as the use of other medications to limit treatment side effects, in adults with schizophrenia.

Detailed description:
Schizophrenia is a chronic brain disease affecting approximately 1% of Americans. Antipsychotic medications can treat some of the most severe symptoms of schizophrenia, but they are not a cure, are often taken for long periods of time, and can have severe side effects. Other, secondary medications can provide relief from some of the most common severe side effects. This study will compare the safety and effectiveness of three different antipsychotic medications, as well as the use of additional medications to limit treatment side effects, in adults with schizophrenia.

Participation in this study will last 28 to 30 weeks and include 11 visits to a study clinic. Each visit will last 2 to 3 hours. The first 2 visits will include screening and baseline measurements. The screening visit will take place at study entry, and the baseline visit will take place 3 to 14 days later. Study visits will then occur 1, 2, and 4 weeks after the baseline visit, followed by monthly visits.

At the baseline visit participants will be randomly assigned to receive olanzapine, perphenazine, or aripiprazole for 28 weeks. Dosage for all three antipsychotic medications will start at low levels and be increased to full strength over 2 weeks. If participants are taking another antipsychotic when they enter the study, this 2-week period will also be used to slowly reduce and then end treatment with the non-study antipsychotic. Side effects to all three antipsychotics will be monitored, and, depending on the side effect, one of three different medications will be added to the treatment regimen. If increased cholesterol levels are experienced with any antipsychotic, simvastatin will be added; if weight gain is experienced, metformin will be added; if involuntary movements, inner restlessness, or muscle stiffness are experienced, benztropine will be added. Because of already known side effects, participants assigned to olanzapine or perphenazine will automatically add metformin or benztropine, respectively, to their regimens.

Starting on the third study visit, participants will also undergo a behavioral treatment aimed at reducing cardiovascular risk factors. This behavioral treatment will involve nine 20-minute sessions, with phone calls being made to participants between sessions.

During each study visit, assessments will be made of schizophrenia symptoms, side effects, adherence to medication regimen, vital signs, waist circumference, and weight. Participants will also complete a questionnaire on use of health care services and undergo instructions on exercise and eating right. On visits 1, 5, 7, and 11, blood will be drawn for standard lab tests. Additional measures at the screening visit will include questions about medical and psychiatric history, a urine test for drugs, and a questionnaire about physical and social activities.

Arms:
arm 1: Participants will receive treatment with olanzapine and metformin, with the possible addition of simvastatin or benztropine, depending on side effects. arm 2: Participants will receive treatment with perphenazine and benztropine, with the possible addition of simvastatin or metformin, depending on side effects. arm 3: Participants will receive treatment with aripiprazole, with the possible addition of simvastatin, metformin, or benztropine, depending on side effects.

Interventions: intervention 1: Olanzapine intervention 2: Perphenazine intervention 3: Aripiprazole intervention 4: Metformin intervention 5: Simvastatin intervention 6: Benztropine
Intervention descriptions: intervention 1: Daily tablets of 10 to 30 mg intervention 2: Daily tablets of 8 to 24 mg intervention 3: Daily tablets of 10 to 30 mg intervention 4: Daily tablets of 850 to 2550 mg intervention 5: Daily tablets of 20 to 40 mg intervention 6: Daily tablets of 1 to 2 mg

Protocol document: