It's a very good question. I'll be curious to see if anyone can answer that with certainty. I cannot.
To be on the safe side I personally would never rely just on herbals, but also use electification through zappers and/or Rife (Rife only if you are not on meds). The Sota Pulser (I take meds & tons of supplements & it has not caused me a problem at all, though some say it will) will also help to clean out the lymphatic system & other places where the bugs can hide even from zappers.
There are forums on CZ for zappers, Rife, Bob Beck (Sota) protocols, etc. The link below also includes some of that info.