Homeopathic drug interactions?

My 4 month old is on Zantac for acid reflux. She teething so I bought a homeopathic remedy called Camilia teething remedy by Boiron. It has chamomilla vulgarus 9C HPUS, phytolacca decandra 5C HPUS, rheum officinale 5C HPUS. I know tylenol is ok to give her with zantac but I don't want to give her that much tylenol. Also, I tried the Camilia yesterday, no reactions, worked great! Does that mean its ok together? Thoughts?