chronic pancreatitis
"I have Crohn's disease, I've had two surgeries, and have problems digesting food. My Doctor put me on Creon, and within an hour after taking it I had the worst case of brain fog ever. Like being stoned, but not in a good way. I tried it for several days and then stopped. Waited several days and tried it again with the same result.
My doctor said it "could not" have been from the Creon............well, I'm sure that it was."