GI upset from meds

Hey everyone,

I've had my transplants for almost a year now, but my medicine is causing some gi upset. Essentially loose stools or diarrhea. I attribute most of it to my meds (and possibly some sour patch kids lol)

but I've been having lose stool almost every day and multiple times a day. Especially after eating.

I know I can't take any probiotics for running the risk of infection. So is there anything that helps to keep you regular?

I have had a heart and liver transplant. With my gallbladder taken out.

Thanks!