Are you sure they are side effects and not the result of a herx? I have heard, although I don't have experience with the BW herbs personally, that many people cut back to the lowest possible dose that they can tolerate and VERY gradually increase it once they stop herxing.
So it may be that you need a half drop or so at first, then wait until you stop herxing, then go up to a drop etc. Other doctors like to hit things all at once and encourage patients to try to hold out through the herx. It's really up to us though as the patient to decide what's better in that regard.