i injected repetedly, something called 5 iai, it didn't like to disolve in wter so i heated it to disolve it, it did but would re-appear in the 2ml pin i was using to inject into the groin thus usually blocking the pin before i could get it all in. i now have hd pins and needles in both legs (i used both sides of the groin) for a week now and have been feeling chills occasionally and like i have the flu. i visited the dr a week ago and he said i'd probably hit the femoral nerve and the pins and needles would go, they haven't so far......