Herx or Adverse Drug Reaction? How do you tell the difference?

This is one of the toughtest parts of the lyme battle. With the toxins being released with treatment, it is crucial to detox as much as possible so that the toxins leave the body and don't build up causing even more symptoms. I herxed terrible in the very beginning of treatment and swore it was a reaction to the drug. It wasn't. I gradually added it back in and I believe it played a crucial role in getting well. Most reactions I have seen, and I may be wrong, but are rashes or diarrhea. Herxing is of course a good sign that treatment is working but it is certainly not pleasant.