Dr.Hahnemann clarified his principle for homoeopathy: Likes fixes Likes, which means, what a substance is fit for causing, it is fit for relieving. By this we comprehend that substances which deliver a lot of side effects in a sound individual can treat a debilitated person who is manifesting a similar set of symptoms.
For instance, when you chop onions, you have watery eyes, a runny nose, you wheeze, hack and every last bit of it occurs due to exposure to the tuber’s active substances. The homoeopathic cure, Allium Cepa, produced using red onion, can help beat a cold or allergy in which one may have comparable side effects i.e. watery eyes, runny nose, sniffling, hacking, or throat aggravation.