<prompt> A patient of schizophrenia on CPZ chlorpromazine develops auditory hallucination again. The next drug to be given is -HaloperidolClozapineSulpirideTianeptin  <response>: Auditory hallucinations positive symptoms are the first symptoms to respond. If auditory hallucinations do not respond or reappear while the patient is on treatment, resistant schizophrenia should be suspected.Clozapine but not newer atypicals is more effective than classical agents for resistant schizophrenia 