I have also found that if I have the IVSM mixed with D5W instead of saline, it helps reduce that nasty taste, helps reduce the bloating, and saves the wear and tear on your veins that saline solution causes.
This is a little trick I learned early on from one of the nurses. My veins are so tiny that they roll and blow. The nurse said that saline solution just eats them. D5W is much kinder on your veins. Since we started using that mixture, I noticed an immediate change in the bloating - fluid retention and the most noticeable of all was the taste. That metallic taste from the solumedrol was reduced significantly.
Worth a try. You have to ask your doc to write the rx so the pharmacy will mix the solumedrol with D5W instead of saline.
I've had about 35 or so IVSM infusions since 2001.