The most popular drug in America is an antipsychotic — and no one really knows how it works

Does anyone remember Thorazine? It was an antipsychotic given to mentally ill people, often in institutions, that was so sedating, it gave rise to the term “Thorazine shuffle.” Ads for Thorazine in medical journals, before drugs were advertised directly to patients, showed Aunt Hattie in a hospital gown, zoned out but causing no trouble to herself or anyone else.