Lomotil
"I have taken Lomotil for 11 years 2 in the am & 2 in the pm which controls my diarrhea except I am good for six/eight weeks and then for whatever reason it doesn't work for a week or so.  I even up my dosage but it doesn't help thankfully the Lomotil starts working again.  Just wish I didn't have the time it doesn't work."