The Slone Survey, run by the Slone Epidemiology Center at Boston University, is an ongoing telephone survey of medication use in the U.S. population. The survey began in 1998 and to date over 19,500 subjects have been interviewed. Information gathered by the survey includes use of prescription and nonprescription medications, vitamins and herbal preparations/natural supplements during the previous week, along with indication, frequency, and duration of use for each product.
Kelly JP, Kaufman DW, Rosenberg L, Kelley K, Cooper SG, Mitchell AA. Use of postmenopausal hormone therapy since the Women's Health Initiative findings. Pharmacoepidemiol Drug Saf. 2005 Dec;14(12):837-42.