Hi,
I think it depends on the individual. I have taken 2 Imodium everyday since 1988, and I am fine. The only time I stopped it for a week at a time was for my three bowel resections. I also take 3 buscopan everyday. Without these two meds, I couldn't leave the house. I take only the regular Imodium not the multi-symptom one as my pharmacist said that one could cause me problems.
All the best,
Julia