If he was falling frequently, sometimes the risk of staying on these meds (bleeding with fall that could lead to death) outweighs the benefit (
stroke prevention which is a few percent per year), which is something his physician needs to determine. Given his age, and history of blood in stool and falls, it is reasonable to keep him on warfarin (coumadin), especially due to the evidence in people over 75 on Pradaxa, and the difficulty of reversal with Xarelto given his falls history.