An acquaintance I know gets Vitamin C injections. But only under supervision of a homeopathic doctor.
Please read this article:http://www.mothernature.com/Library/...ooks/10/88.cfm
And get your dad to stop eating meat straight away. Meat and MS do not go together.
I read up a lot about diet and MS because there was a time when they thought I may have it (turned out I didn't) and I had decided that if it was the case, I would treat myself with proper nutrition and not medicine.