Welcome to HealingWell, Mayflower.
Canasa and Asacol both contain the same drug, Mesalamine. Both are considered "topical" medications, meaning they work through direct contact with the colon wall and little is absorbed into the body. The great news is that both have been used by women throughout pregnancy for years and have never been associated with any problems for either mother or baby. You can safely make your decision based on what your GI feels will work best for you. If you have proctitis - disease limited to the rectum, the Canasa may be a good choice. If the colon above the rectum is involved (left-sided or pancolitis), Asacol would be indicated, or better yet, both. The risk from the medication is pretty non-existant, while the risk of a bad flare causing problems is very real.
Congratulations on your pregnancy, and keep us posted on how you're doing!
Moderate to severe left-sided UC (21 cm) diagnosed 2001.
Avascular necrosis in both shoulders is my "forever" gift from steroid therapy.
Colazal, Remicade, Nature's Way Primadophilus Reuteri. In remission since April, 2006.
Co-Moderator UC Forum
Please remember to consult your health care provider when making health-related decisions.