Delusional parasitosis (DP) is a psychiatric disorder which is characterized by wrong belief as the person's body is infested with parasites although there is not an medical evidence. Shared Psychotic Disorder was reported among 10% of cases with DP. Conventional and atypical antipschotics are both used in the treatment of DP. The data about use of atypical antipsycotics in DP is restricted by case reports and case series and there is no systematic research about this issue according to our knowledge. Oral or intramuscular depot form of risperidon is the most frequently used atypical antipsychotic agent in the treatment of DP. In this article, we aimed to present succesful treatment of two patients with DP who were presented as shared psychotic disorder by low dose risperidone.
Keywords: Delusional parasitosis, shared psychotic disorder, risperidone