Once you are following the half an hour rule then you can eat raw onion, garlic, ginger, and other strong smelling substances along with the homoeopathic medicines. Homeopathic medicines should never be touched directly by putting on to the palm. They are supposed to be consumed directly from the bottle. In case the medicine is a liquid form, then a dropper needs to be used for the consumption of the medicine. If the medicine is touched with hands, this might result in the spirit blended with the medicine being taken off. Actually, it is the spirit blended with the pills, the most important constituent of homeopathic medications.