A Double Blind, Double Dummy, Randomized, Comparative Study Of The Efficacy And Safety Of Valdecoxib 40 Mg Twice Daily, As Needed In The First Menstrual Cycle Day And Then Once A Day, And Piroxicam 40 Mg Once A Day In The Treatment Of Patients With Primary Dysmenorrhea

Inclusion Criteria: * History of primary dysmenorrhea with moderate to severe menstrual cramping pain for which the patient took analgesic medication for at least three of six previous menstrual cycles before enrollment * Subjects were to have been in good health and were to have had a complete physical exam (including a pap smear and an endovaginal or pelvic ultrasound, unless the subject had had these examinations performed within 6 months prior to the Screening Visit and the results were normal) prior to inclusion Exclusion Criteria: * Subjects who were pregnant, lactating, breastfeeding or not using adequate methods of birth control