Some 5-ASA work best in certain parts of the gut, so you may be prescribed a particular type or brand depending on where you have the inflammation. Many specialists in IBD believe that if a particular brand or type of 5-ASA is working well, you should not be switched to another without a good clinical reason.
Oral 5-ASA were previously prescribed in two or three doses during the day. However, recent evidence suggests that taking these together in a single daily dose can be just as effective. If you feel this could be helpful for you, discuss this with your doctor.
Some 5-ASA come as suppositories or enemas so may be useful if you have proctitis (inflammation of the rectum) or proctosigmoiditis (inflammation of the rectum and sigmoid colon).