I don't recall what I posted previously, so forgive if I’m repeating myself. There are 3 known medication triggers for both forms of MC (NSAIDs, PPIs, SSRIs) and one maybe (Statins). The only reliable treatment is Budesonide - a steroid that reduces intestine inflammation (tho there is a version used in pulmonary inflammation). It’s not cheap either - tho Good Rx reduces the price.
The drug is very effective. But some months after the treatment course is completed, the relapse rate is very high. That has happened twice to me. So since July of 2022 I have had more time than not where colitis has ruled my life. I recently went on the lowest dose of Budesonide as a maintenance dose. So far so good.

Fyi - if you ever find yourself again with unrelenting, rules-your-life diarrhea, I find that 2-3 fluid filled capsules of Pepto Bismol 2-3 times a day, taken with a heaping teaspoon of New Zealand Manuka Honey (expensive!) in real Ginger tea is the best treatment

Below is my fave that I get on Amazon