The following information is the most accurate and documented data available on psychiatric drug usage. The information is from IQVia (formerly IMS Health), a company that provides information, services and technology for the healthcare industry. It is the largest vendor of U.S. physician prescribing data. The following data was taken from the IQVia Total Patient Tracker Database for 2020, extracted January 2021. To find out about the hundreds of drug regulatory agency warnings and documented side effects for any class of psychiatric drug listed on this page (i.e., ADHD Drugs, Antidepressants, Antipsychotics, etc.) click the hyperlinks listed below: