Yes, I had this problem too (in MN). It was discontinued (everywhere). My doctor just had me replace the cromolyn I was using with saline. Apparently (what I was told), the cromolyn was used to help treat asthma problems, as it was assumed that all CFers had asthma problems. If I noticed any problems by not taking it, then I was to call back and they would get me an inhaler to use when needed.
I have not had any problems (that I've noticed) not using the cromolyn to date.