It was not until she started on warfarin that she had the headaches or swollen feet. Her doctor appears to regard me as a nuisance, as every time I try asking him a question he remembers something else he has to do elsewhere. She has her regular bloodtests and these always find that warfarin is low in her system, so they always up the dose. Until she started taking warfarin she seemed to be recovering very well, she's fully compos mentis but I'm worried that too much medication will take that away from her.