I understand it's saving your life, and I don't know what I would do in your situation. It's a situation I hope I never have to face. But is it likely you'll be able to find a synthetic alternative to your medication? I hope I haven't offended you or anything, I understand your situation. It must be even worse to be a vegan in that situation.
I only just saw this (though it was posted *ages* ago). Firstly - in my lifetime it is likely that there will be a syntehtic alternative produced, so that kind of keeps me going. But, like many thigns, they're never going to take the trouble to make one if people don't want it. I write to the company that produces my drug on a yearly basis requesting a synthetic alternative.
I'm now facing a situation in which I may have to take the medication significantly more often (for only a short period of time) and it has started me thinking about it all over again. I think I am more likely to be firm in trying an alternative, particularly as I now live in a country where there is a wider range of medications avalible, and the cost is not as prohibitive.
It's hard, and I never take offence. It's easy to say that you would never consider taking a medication that contained animal (by)products, but it's much harder when someone gives you the alternative of possible death. I watched my grandfather die from the disease that I have and it wasn't a nice, peaceful death - it was horrible and painful.
Anyway - everyone is different, and makes different choices. This is mine, and I'm the one who has to live with it.