Inclusion Criteria:

1. Subjects will meet DSM-IV diagnostic criteria for schizophreniform disorder or schizophrenia, with psychotic symptoms persisting at least four weeks in total, and not more than 24 months.
2. Subjects will be between 15 and 40 years of age, inclusive.
3. Subjects will be able to fully participate in the informed consent process, or have a legal guardian able to participate in the informed consent process.
4. Fasting red blood cell fatty acid composition omega-3 index of less than or equal to 1.5 %. That corresponds to a 60% deficit relative to normal controls (Evans et al., 2003;Reddy et al., 2004;Khan et al., 2002). Based on our data, a comparable 65% RBC DHA composition deficit alters rodent behavior in an animal model of psychosis (McNamara et al., submitted).
5. Subjects will be able to participate in treatment for their illness, including willingness to receive antipsychotic medication prescribed by their treating physician as part of their treatment plan.

Exclusion Criteria:

1. Greater than a four month total previous history of antipsychotic drug treatment;
2. Con¬firmed or suspected drug-induced psychosis;
3. Serious, unstable medical illness;
4. Underlying medical condition which could cause psychotic symptoms;
5. Known history of seizure disorder, or a clinically significant head injury (prolonged loss of consciousness, neurological sequelae, or demonstrated structural brain injury);
6. Mental retardation;
7. Known hypersensitivity to study medication;
8. Substance dependence within the previous 6 months;
9. Current symptoms which present serious risk of danger to self or others.