Please select the eligibility criteria that correspond to the clinical trial below.
Title: Augmenting Clozapine With Sertindole - a Double Blinded Randomized Placebo Study
Brief Summary: The purpose of the study is to determine whether addition of sertindole to clozapine treatment can improve psychosis or the metabolic side-effects of clozapine in patients with treatment-resistant schizophrenia.


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:

* Diagnosis of schizophrenia according to DSM-IV criteria
* Any schizoaffective disorder or subtype
* Score greater than 60 on the Positive and Negative Syndrome Scale (PANSS)
* Currently taking clozapine
* Score of four or higher on two or more items from the positive symptom subscale of the PANSS
* Score of 4 or greater on the Clinical Global Impression (CGI) scale
* Clozapine plasma level greater than 378 µg/ml
* Stable dose of clozapine demonstrated to have been associated with a clozapine plasma level greater than 378 µg/ml for at least eight weeks
* Able to read at an 8th grade level or above

Exclusion Criteria:

* History of unstable coronary artery disease
* Congestive heart failure
* History of long Q-T syndrome
* History of cardiac arrhythmia
* History of cardiac conduction delay
* Baseline QT correction score greater than 0.425 seconds
* Liver disease
* History of stroke
* History of Neuroleptic Malignant Syndrome
* Hypokalemia
* Hypocalcemia
* Current blindness, deafness, language difficulties, or any other disability which may prevent participation or cooperation in the study
* Current suicidal or homicidal thoughts
* Currently abusing psychoactive substances
* Currently receiving antidepressants, thymoleptics, L-DOPA, buspirone, or antipsychotics other than clozapine (Valproic acid and Divalproex sodium are not criteria for exclusion)
C: 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).
D: Inclusion Criteria:

* Subjects treated with clozapine for the indication of poor response to other antipsychotic medications.
* Treatment with clozapine is at a stable dose for at least 12 weeks. Dose must be 400 mg/day or more, unless side effects limited increase of dose.

Exclusion Criteria:

* Subjects with significant alcohol or substance abuse in the past 3 months.
* Subjects with a previous trial of risperidone augmentation of clozapine
* Subjects who are pregnant, breast-feeding, or women of child-bearing potential not using adequate contraception
* Subjects requiring treatment with anticonvulsants.
* Subjects with known hypersensitivity or allergy to risperidone.
* Subjects with hematological or other contraindications to continued clozapine treatment.

Answer: A