I am an anaphylactic and have severe allergies to many drugs. Recently I have discovered due to a hand injury that I am extremely (stop breathing) allergic to the generic form of Vicodine. Then to several musel relaxant type drugs--all generic. I wondered if there was a common link? I would say there probably is a common filler in the generics. Something tested to be ingestible, and inexpensive. I don't know for sure what it is though.
You may have to compare ingredients lists to see if you can figure it out. Hopefully, the internet will help you in your quest. | 