Working on an antihistaminic drug which they had developed for the control of allergies such as hay fever, researchers at France's Rhône-Poulenc laboratories found that the drug made many people sleepy. For a world in need of sedatives, they took the logical step of trying to put together a related chemical that would make people even sleepier. What they found (in 1950) and first tagged 4560-RP, or chlorpromazine hydrochloride,* is now the most exciting new drug seeking recognition in the world's pharmacopoeias.
By any name, chlorpromazine is a versatile and fantastically interesting drug...