Hello Its good to read the things about the illness yourself. When delusional parasitosis is diagnosed, first thing is to take second opinion to confirm diagnosis. The organic brain diseases must be ruled out with the help of CT SCAN. Also consult a dermatologist to rule out skin infection. The treatment for this is antipsychotics. Usually risperidone or pimozide are given monitoring their side effects. I must tell you that this disorder is very difficult to treat. The person has to be mantained on medicines for long (sometimes for lifetime). Family person have to be supportive to patient. You should never argue with the patient and never try to contradict the delusions. Hope this would help you. Thanks.