I will mention this to my neurologist. I have been very lucky so far and have not needed to take many of the Diphen/Atropine. I was prescribed 4 a day. Of the original 120 tabs that were filled on November 25th, I have only taken 25 to date. I have had only two or three minor bouts of diarrhea, usually when home. I did take some as a prophylactic to avoid a situation on a busy cab night, like News Years Eve. On balance I am very lucky not to be plagued with this particular side effect. I hope the remains true going forward.