Although antipsychotic drugs are among the most widely prescribed medications, individuals with schizophrenia, bipolar disorder and autism-spectrum disorders often experience severe side effects because the drugs interact with dozens of other brain receptors. Now, scientists at the UNC School of Medicine and UC San Francisco (UCSF) have solved the first high-resolution crystal structure of the dopamine 2 receptor (DRD2) bound to the antipsychotic drug risperidone, yielding a long-awaited tool for drug developers, psychiatrists, and neuroscientists.