I had a similar reaction to another product when starting out 18 months ago (vomitted 4 hours straight and almost had to go to the ER). Dr. C recommends starting very slowly with the smallest possible dosages to determine how your body will react, then working up slowly. So I've been following that pattern ever since with great success. My assumption, however, is that such reactions are evidence that we must have the problem in a big way and "they" are very unhappy with our trying to evict them from their homes!
Once you gain some momentum, after experimenting with what your body can tolerate, you'll get the upper hand in this Battle for the Body (ha!). As the broken record of the forum, let me recommend again, the Zapper (1-800-220-3741). I love my Super DeLuxe model with the wrist bands, but you can also get a small inexpensive model from http://www.Zapperplans.com
for $10. For anyone with our level of infestation (anyone who vomits from the backlash of the invaders), I would urge you to get a Zapper. Otherwise, if you're like me, you'll be tortured by all the squirmers, wrigglers, creepers, crawlers, and bucking broncos!
Since we can only hold so much herbal stuff (which gets them very agitated), we need a recourse while they're in the throes of dying. Enter, Da Zappa! It will force them to stop tormenting you by paralyzing them with a small electrical current and relieve whatever pain you may be suffering. After they've been evicted, the Zapper will kill the bad bacteria they've left behind (very irritating and potentially dangerous), cauterize any "wounds", and help you relax. I used my Zapper for hours at a time and days on end at the highest setting (16V) on Duration Mode (one hour) up until recently and don't know how I would've survived without it.
BTW, I've used the ParaGone products, http://www.renewlife.com
(1-800-830-4778), with success, but that was after I'd learned the principles above and needed to hit them with a new formula since they become desensitized to your old routine after a few months.
For anyone just starting out, I'd recommend the Colonix Kit from http://www.DrNatura.com
(1-800-877-0414), along with their Flora Protect Probiotics to recolonize the GI Tract with beneficial flora/fauna (see raves from 7/6/05 on the Bowel Cleanse Support Forum
). And don't forget to pray. I know I was led to these healers by our Holy Medical Director. All the best.