trippy! It could be the first ingredient was in too high a dose for you. At the wrong dose it's poisonous, as are many homeopathic remedies, which is why I don't recommend them in this forum.
I'm not a big fan of Threelac. It seems to work okay if you have a very simple infection brought on by Antibiotics and you catch it soon enough. It doesn't seem to work if you've had the overgrowth for a long time.