I tried C for almost 2yrs. I had a ton of side effects.. No clue if it was working for me tho. I think I've had more exacerbations since quitting it, but I was having exacerbations a lot during the time I took it.

The side effects just were a bit too bothersome for me, and the fact that my neuro ruined any of the (little) faith that I had in the drug that I just quit right about this time last year.

I still have four boxes in my refrigerator. I wonder how long it's good? (I was always four boxes behind because of a lazy injection training nurse who didnt show for three months)