Delusional parasitosis responding to risperidone.

Delusional parasitosis (DP) appears to be common in India. This condition is more prevalent in elderly people. Currently used treatment pimozide, a high potency antipsychotic, has disadvantage of extra-pyramidal symptoms & tardive dyskinesia in this age group. Hence there is a need to evaluate the use of high potency atypical antipsychotic risperidone in DP. This case report documents the efficacy of risperidone in DP.