Hopefully your mum will be allowed the medications but as stated by someone else already they will at best slow her decline not halt it. If she cannot have them you need to ensure the other medications are taken. Rather harshly you may be introduced early on to one reality of helping a person with Dementia, namely the use of white lies, evasions, half truths, etc. Her GP would I am sure be concerned if her existing medications were not taken. Seek that person’s advice. Possibly your mum could be given a vitamin C supplement introduced to her as a “memory pill”. The alternative is no Warfarin taken and a significant increase in the risk of a stroke. I felt uncomfortable when I started having to tell my mum little white lies, as she raised her children to respect the truth. Getting mum through two cataract procedures she was deeply anxious about was difficult, but proved to be very worthwhile. Half truths helped.
I have a lot of empathy for your position. I remember when I started to care for my mum I had a lot of anxiety, what to do, where to get information, what is the best thing to do, how to coax a loved one to do what is required in their best interests? Cut yourself some slack. In reality there are few golden bullet answers. When you have met one PWD that is exactly what you have done, met one PWD. Many will have common problems, but each person is unique. Frequently overlooked is the point that Carers also vary greatly. Some are very practical, others better at emotional strains, etc. You may feel anxious and overwhelmed at the start and think god how will I cope as things develop, something that caused me a lot of initial anxiety. Your knowledge and experience will grow, developed by each new issue that confronts you. Your mum’s statement on her medication may force you to consult the GP for advice, or she may revise her opinion or possibly simply forget it. Please remember your mum is going through a learning process as well. Initial reaction may well change, but better to have a fallback plan of action.
Finally stay in contact with the forum. I read a lot of threads but as months passed I found myself getting anxious and emotionally low. I came to the forum with several issues that were bothering me. Each time within a few days several people had posted really useful replies. It felt great to tap into a wealth of experience given generously by strangers. We do not meet but we share the carer role, with all of the related anxiety, frustration, uncertainty but also beautiful moments few others outside the role will share. Hope your mum gets the medication, if not changes her opinion or takes her vitamin C or whatever else the GP might issue as a “memory pill”. Stay well.