Hello, thanks for the query to H. C.M.C.
The age of mother is 87 yrs , naturally age shows its effects as senile degeneration , fragile, weakness etc.
In young age these medicines can be adjusted in the body but due to old age as all these are not possible to adjust in the weak body and underweight
However doctor prescribed these drugs according to the condition of patient and according to his knowledge ( doctor's).
So please don't blame doctor or drugs , but keep in mind one thing that it is the age which is responsible for the condition of the patient.
Those drug which prevent clotting of blood are the best for your mother in my opine.
All thing will decide the concerned doctor.
REGARDS Dr. HET