Please select the eligibility criteria that correspond to the clinical trial below.
Title: Randomized Evaluation of the Effectiveness of Clozapine and Aripiprazole Versus Clozapine and Haloperidol in the Treatment of Schizophrenia. An Independent, Pragmatic, Multicentre, Parallel-Group, Superiority Trial.
Brief Summary: The principal clinical question to be answered by CHAT (Clozapine Haloperidol Aripiprazole Trial) is the relative efficacy and tolerability of combination treatment with clozapine plus aripiprazole compared to combination treatment with clozapine plus haloperidol in patients with an incomplete response to treatment with clozapine over an appropriate period of time.


Options:
A: Inclusion Criteria:

* ICD10 diagnosis of schizophrenia (F20.0-3)
* Clozapine treatment minimum 6 months
* Total PANSS \>65
* No antipsychotic other than clozapine drug 1 month prior inclusion

Exclusion Criteria:

* QTc \>500 ms
* Violence to SPC of clozapine or Serdolect
* Major depression
* Significant substance misuse interfering with participating in the study
* Cardiovascular disease
B: Inclusion Criteria:

* Patients with schizophrenia and schizoaffective disorder according to International Classification of Diseases (ICD-10);
* age 18-65;
* Positive and Negative Symptom Scale Total-Score ≥ 70 and two items of the positive symptom subscale ≥4.
* voluntary treatment after written informed consent
* legal capacity
* exclusion of pregnancy by laboratory test (Beta HCG)

Exclusion Criteria:

* participation in other interventional studies with drugs or medical devices
* first episode patients
* physical disease that might have effects on the conduct or evaluation of the trial
* contraindications to medication according to experts information
* oversensitivity to active substance or other component of the drugs used
* known clozapine resistance
* suicidal ideation
* pregnancy or lactation
* which of pregnancy or absence save contraception
* dependency to sponsor or investigator
* institutionalization through judicial or regulatory order
* oversensitivity to placebo (mannite/aerosil)
C: Inclusion Criteria:

* Patients with schizophrenia treated with clozapine (200-900 mg/day), who gained at least 2.5 kg while on clozapine.

Exclusion Criteria:

* Patients known to be allergic to aripiprazole
* Hospitalized patients
* Patients who have previously received study medication in an aripiprazole clinical study or who have participated in any clinical trial with an investigational agent within the past month.
D: Inclusion Criteria:

1. Current treatment with clozapine for the primary indication of schizophrenia (clinical diagnosis, guided by DSM-IV criteria).
2. Treatment with clozapine for at least six months at a stable dose of 400 mg or more per day, unless the size of the dose was limited by side-effects.
3. Unsatisfactory benefit from clozapine treatment, as indicated by the presence of positive symptoms (delusions, hallucinations, abnormal behaviour, clinical diagnosis)
4. Age 18 and above.
5. Agreement between investigator and patient to enter the study.
6. The patient is normally resident in Italy.
7. It is considered clinically reasonable to try combination treatment with clozapine and aripiprazole or with clozapine and haloperidol.
8. Uncertainty about which trial treatment would be best for the participant.
9. No medical disorder or condition contraindicates either of the investigational drugs.
10. Agreement between investigator and patient to discontinue any antipsychotic drugs other than clozapine (including long-acting antipsychotic drugs).

Answer: D