My Mother Has Been On Donepezilhcl Since May. It Was

My mother has been on donepezilhcl since May. It was increased to 10 mg. On 8/20/18. Last week she had a very good week, but was unnerved when her bowels just let go while standing in the bathroom. This has not happened before or since. She hasalso been experiencing leg cramps which have been increasingly severe in the past week. Which I believe could have been the result of her increased activity, and chronic dehydration. Any thoughts?