The prescribing information on Asacol does list increased appetite as a side effect of Asacol. I did not see "weight gain" listed as a side effect from any of their studies. That does not mean that it has not been reported since then. If the Asacol is reducing your symptoms, it is possible that your appetite has increased and you are tolerating and/or absorbing nutrients more thereby leading to weight gain.
However, being a person that has had very rare side effects to medications, what you are experiencing might just be the medication. One never knows exactly because this disease can really change how we absorb and handle oral medications.
Moderator Crohn's Disease Forum
CD, Ankylosing Spondylitis, small fiber peripheral neuropathy, avascular necrosis, diffuse connective tissue disease, Sjogren's Syndrome ?