Jealous delusional ideation appears in 7-14% of cases of Parkinson's disease. Treatment with dopaminomimetics drugs is a significant risk factor for psychosis. However, the most likely etiology of psychosis in these patients is a loss of central cholinergic function associated with age since described psychosis even before the introduction of the L-Dopamine. Cognitive impairment and sleep disorders are predictors of development of psychosis.

Present a clinical case of psychosis in Parkinson's disease and its treatment.

Reason for consultation. Patient diagnosed with Parkinson's disease with behavioral disorder and delusional.

The patient after antiparkinsonian medication has increased suspicion, self-referentiality, delusional jealousy ideation to her husband, delusional interpretations regarding somatic symptoms, insomnia and behavioral disorders with aggression.

Mother with Alzheimer's.

No contact with mental health.

Conscious, repetitive language, dysphoric mood with delusions of prejudice and jealousy.

Mixed insomnia.

Psychosis in Parkinson's disease.

Quetiapine 300 mg/day. Carbidopa 25 mg/L-dopa 100 mg: 1-0-1. On subsequent visits quetiapine was suspended and replaced by clozapine 200 mg/day.

The treatment of psychosis was effective with the use of quetiapine and subsequently clozapine with good tolerance and effectiveness. He also said lower antiparkinsonian medication.

Psychotic symptoms are the most common psychiatric clinic in Parkinson's disease. Often not enough antiparkinsonian dopaminomimetics reduced to control psychotic symptoms and use of antipsychotics is required. The use of antipsychotics in Parkinson's disease should be careful for the likely increase in motor clinical and increased mortality. The most useful, are especially quetiapine and clozapine atypical antipsychotics.

The authors have not supplied their declaration of competing interest.