Data on national patterns of use of psychotherapeutic drugs derive from a national sample of American adults. During the year preceding the interview, 13% of the men and 29% of the women had used such prescription drugs–in particular minor tranquilizers and daytime sedatives. Prevalence of prescription drug use varies greatly by sex, age, and region of the country.
Parry HJ, Balter MB, Mellinger GD, Cisin IH, Manheimer DI. National Patterns of Psychotherapeutic Drug Use. Arch Gen Psychiatry. 1973;28(6):769–783. doi:10.1001/archpsyc.1973.01750360007002