Akathisia (Restless Legs Syndrome) in People With Schizophrenia and Mental Retardation

Akathisia is a movement disorder that is often a side effect of certain psychiatric drugs. People with akathisia are unable to sit or keep still, complain of restlessness, fidget, rock from foot to foot, and pace. Akathisia is sometimes called "restless legs syndrome." The drugs that can cause akathisia are most often used to treat patients with schizophrenia or mental retardation (MR). This study will evaluate akathisia in both schizophrenic and MR patients who either have long-term akathisia or who are starting treatment with psychiatric drugs.