I'm not sure where you are writing from, but if you are in the U.S., the foam is not available here. Your 5ASA rectal choices are the enema or the suppository (Canasa). I called the pharm rep about
this, and was told that there are no plans to make the foam version available in the U.S. Unfortunate, because it could be a good choice for many, especially those with proctosigmoiditis.
There is a foam steroid option here, Cortifoam...
Hope that helps...
Jo