A 31-year-old man with schizophrenia has persistent positive symptoms despite adequate trials of two different antipsychotics at therapeutic doses for at least 6 weeks each with good adherence. What is the recommended next pharmacological step?AAdd benzodiazepines to existing antipsychoticBSwitch to clozapineCIncrease the current antipsychotic to supra-therapeutic dosesDAdd an antidepressantEStop all antipsychotics and use psychological therapy aloneCheck my answer