I don't have pancolitis, but my initial diagnosis had me quite sick and severe in symptoms.
Remember that UC heals "backwards", so from top to bottom. So what Sherry described is what needs to be tended to.
My flares are very mild, and I deal with them earlier and earlier even now. Rectal meds should be your very best friend, and if you can use the mesalamine enemas, please start using them now, nightly....
I get my next c-scope next wednesday, and if all is well, what I'm doing has paid off.
I think if you can do the mesalamine oral/rectal consistently and get to the point where you're treating flares earlier, you'll get the rhythm of using those meds.
It's not an all or nothing proposition...it's a commitment. I have the option to look back well over 22 years, and as I said...my diagnosis isn't pancolitis, which may factor into that success.
But...there are many with pancolitis who have had success with the oral/rectal 5ASA route....I think it's worth a try at the very least.
Of course, in saying all that, life always gets in the way...and sometimes it's difficult to get even a mild flare to behave even when using the meds.
q