The
atypical antipsychotic medications were designed during the
1990s, with emphasis on treating
schizophrenia, and are gradually replacing the
typical antipsychotics. The atypical antipsychotics are believed to be better at treating the "negative symptoms" of schizphrenia. In the atypical medications, the risk of
tardive dyskinesia[?] is lower, however,
weight-gain is more common in many, but not all, of the atypical medications.