 [ Symptoms ] my mother is 91 requires anti coagulants need second medical opinion [ Disease ] hi first of all get confirmation done that whether she has deep vein thrombosis or dvt or not then you can worry about the anti coagulants so first get tests done like d dimers test ultrasound venography etc if it is confirmed then you can discuss about new generation of anti coagulants and appropriate dose titration can be done so that she does not suffer complications like excessive bleeding hope this helps