Denzapine is used: - to treat schizophrenia when at least two other antipsychotic medicines, including one of the newer atypical antipsychotics, have not worked or have caused severe side effects - to treat psychotic disorders occurring in patients with Parkinson's disease, when standard treatment has failed. Caution: Denzapine should only be prescribed for patients who are registered with Denzapine Monitoring Service