Omega-3 in the treatment of schizophrenia

INTERVENTION: Intervention 1: Tablet chlorpromazine (1000mg/day ) or equivalent doses of typical antipsychotics combined with 3000mg/day of omega‐3 as intervention group for 6 months. Intervention 2: Tablets chlorpromazine(1000 mg/day) or equivalent doses of typical antipsychotics combined with placebo as control group for 6 months. Placebo Tablet chlorpromazine (1000mg/day ) or equivalent doses of typical antipsychotics combined with 3000mg/day of omega‐3 as intervention group for 6 months Tablets chlorpromazine(1000 mg/day) or equivalent doses of typical antipsychotics combined with placebo as control group for 6 months Treatment ‐ Drugs CONDITION: Schizophrenia schizophrenia. ; Schizophrenia PRIMARY OUTCOME: Severity of schizophrenia. Timepoint: Baseline and 6 months after beginnig of treatmen. Method of measurement: Positive and Negative Syndrome Scale (PANSS). INCLUSION CRITERIA: INCLUSION CRITERIA: Age between 18 and 60, diagnosis of Schizophrenia based on DSM IV, chronic Schizophrenia Exclusion Criteria: Substance dependence, any serious medical problem