What Could Be The Cause For Recurring Loose Motion And Indigestion Despite Taking Ganaton, Dexiva, Flagyl, And Novidate?

Hi doctor my mother is ill about last 2 months symptoms like loose motion, stomach issue milk, beef is not digested. She is taking ganaton, dexiva, flagyl, and novidate but after few days again loose motion started.kindly tell me the problem of solution