How much midol or other OTC PMS medication is sold each month or year?

This report may be of interest to you:

"Chapter Five: Menstrual Pain Relievers

Table 5-1 Incidence of Menstrual Pain in United States: (Menstrual
Disorders/Dysmenorrhea)
Table 5-2 Prescription Drugs with Anticipated OTC Approval by
Ingredient, Trade Name, Distributor and Current Activity
Table 5-3 The U.S. Market for OTC Menstrual Pain Relievers 1998-2002:
(Total Market Size and Growth Rate)
Table 5-4 The U.S. Market for OTC Menstrual Pain Relievers 2003-2006 
Table 5-5 The U.S. Market for Menstrual Relievers Market Share by
Leading Supplier 2002"

http://www.mindbranch.com/catalog/print_product_page.jsp?code=R566-0102