hi thanks for using healthcare magic Generally there is no special preparation needed for this test. However, depending upon your diagnosis, you may need to take antibiotics to guard against possible infection. To ensure that you are not pregnant, the study is done between Day 7 and 10 of your cycle. Prior to the procedure you may take any pain killer like Ibuprofen 400 mg or Acetaminophen 500 mg a half hour before and one hour after the procedure. There are no dietary restrictions. A small catheter is placed into the cervix and the dye is injected. You may feel heavy cramping during, and for several hours following this procedure. Expect a sticky vaginal discharge for a few days as the dye is expelled from the uterus. Use a pad or panty liner during this time to allow fluid to escape. Any dye that remains will be absorbed without any ill effect. thanks