I don't know what is the best medicine for your colitis but I can tell you which medications are most commonly used.
You've probably been taking aminosalicylates - at least 3 different kinds are used; and perhaps corticosteroids as well (many different types) - at least on a short term basis. There are also immunosuppressants such as Imuran and Purinethol. There are mesalamine or olsalazine enemas, cyclosporine, anti-diarrheals, etc. The most commonly used drug when these fail appears to be Remicade. At least one new drug for colitis is in the pipeline.
Its a tough disease, thats for sure. Good luck!
http://www.healthcentral.com/ibd/irritable-bowel-syndrome-000069_9-145.html
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of The HealthCentral Network. The HealthCentral Network does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.