Sunny,
You're the only one I've ever heard complain about the same problem I have: choking on pills, ugh it's aweful. I know how you feel only too well.
I've always had problems swallowing pills; they get stuck in my throat, and then they come right back up.
And those mesalamines pills are huge!
I don't believe they can be emptied, as they are time released to open in a certain part of the colon/intestine.
Sorry, I don't have any solutions for you there.
As far as your asking about liquid minerals and vitamins, that's a great idea. And especially for people like us who have major problems swallowing big pills. All the while I was heavily bleeding for more than 1 1/2 years, the only thing that kept my blood work normal and not anemic was my taking daily liquid minerals and liquid vitamins.
If you're interested, you can check out my sig, click on https://www.healingwell.com/community/default.aspx?f=38&m=1666318 , and you'll find under the 11th post, see #12 where I talk about liquid minerals/vitamins. There is the name of the company I get mine from (and a coupon code too).
Let me know how else I can help you.