It depends on the release time and transit time. I think the transit time for J Pouchers is less than 4 hours. You need to inquire of the release time of the specific med.

I have the stoma for now

Release time is only part of it. There are different pharmaceutical strategies for extended release, some of which are engineered to release in a specific part of the intestine, and some of which are designed to be metabolized at multiple rates. In general I’d suggest avoiding extended release meds if you lack a colon, since you may get unpredictable results.