Psychotropic drugs are often an essential component in the treatment of individuals with mental disorders. Yet few studies have provided data on the proportions of individuals who use specific medications for certain disorders. We present data on the use of psychotropic drugs by persons diagnosed with schizophrenia or an affective disorder and enrolled in Medicaid programs in 1995 in one of ten states—Alabama, Arkansas, Delaware, Georgia, Kansas, Kentucky, New Hampshire, New Jersey, Vermont, and Wyoming.