Is it advisable to take IVIg injection for neurological problems due to radiation therapy for breast cancer?

Hi doctor,

My mother is suffering from primary breast cancer, and she has brain metastasis. We are taking treatment for the last three years. She underwent so many chemotherapies, radiation, body and brain radiation, surgery, etc. Presently my mother is taking Herceptin and Halaven medicines.

My mother's problems are: she cannot stand for more than a minute and unable to walk properly. She is also unable to get up from the floor when she sits on the floor. I have consulted a neurologist here. He recommended for neuro condition test. Please see the attached report. He told all the nervous system got damaged because of the chemo medicines. He has written some tablets on the prescription.

He asked for us to admit to the hospital, and he said that he would give some injection for three days, which will recover fast and it will be good. But it would be costly. If we cannot afford that much, he can prescribe us an affordable injection. Please suggest shall we take the injections or not. If so, which one is better. Please give the correct decision whether to take the injections or not. Or tablets is enough. Kindly recommend the tablets and injections, which are very good, so that she can recover quickly.