Dose Finding of Quetiapine Fumarate 200mg vs 400mg in First Episode Psychosis

A Naturalistic, Prospective, Single Centre, Double Blinded, Fixed Dose, Randomised, Four Week Comparison Study Investigating Efficacy, Tolerability and Safety of 200 mg Per Day Versus 400 mg Per Day Quetiapine Fumarate in 200 Drug naïve First Episode Psychosis Patients Aged 15 to 25 Years.

The purpose of this study is determine the minimal effective dose and the impact on:

1. treatment outcomes at 4, 12 and/or 48 weeks the treatment has required to treat patients experiencing the first psychotic episode
2. the final maintenance doses
3. the use of other medications
4. the amount of changes to other antipsychotic medication
5. the number of hospitalization days

Inclusion Criteria:

• Patients experiencing their first psychotic episode
• Male or Female
• Aged 15-25

Exclusion Criteria:

• Previous treatment with antipsychotic medication (longer than 1 week)
• History of a clinically significant physical illness
• Organic disorder presenting with psychotic symptoms