phenothiazines such as chlorpromazine were the first type of
Chlorpromazine Chlorpromazine was discovered in 1950 and was the first antipsychotic.[3][4] It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[5] Its introduction has been labeled as one of the great advances in the history of psychiatry.[6][7] It is available as a generic medication.[2] The wholesale cost in the developing world is between US$0.02 and US$0.12 per day.[8] In the United States it costs about US$2 per day.[2]