My daughter has been on Entocort with no break for three years. For more than the last two of those three years, only one pill a day (3 mg).
One doc asked, "Has the [one pill of] Entocort stopped Crohn's dead in its tracks?" -- the subsequent colonoscopy revealed it had not.
My daughter is much improved, due to Entocort and diet, but we want to stop Crohn's completely - the danger of Entocort is that it allows slow, continued, deterioration to take place.
I've seen posts saying Entocort worked at first, but then petered out. In my opinion, this is probably because the Entocort allowed the the damage from Crohn's to increase to the point where Entocort could no longer help.
This is why she is searching for an alternative long term solution - right now, is in her fourth week on LDN and still taking that one pill of Entocort.