Answer:
Well i cant really say if youcant or can survive terminal cancer , but laetrile is proven to be very useful if the individual is treated with high doses of it. You can find some information about this online. These two websites can tell you a little about it all like what it is , how it works etc :
http://www.cancertutor.com/Cancer/Laetrile.html
and
http://www.cancerhelp.org.uk/about-cancer/treatment/complementary-alternative/therapies/laetrile
Hope this helps