Homeopathy is based on philosophy that a substance that can produce symptoms in a healthy person, can cure those symptoms in a sick person Similia Similibus Curentur, which translates to “Let likes cure likes.” For example if you eat an onion, your eyes start to water ,itch and burn, your nose is runny with clear discharge, you are sneezing. Some people experience these symptoms during cold and they would be helped by homeopathic preparation of onion called Allium cepa.
The truth of this law has been verified experimentally and clinically for the last 200 years and more since Samuel Hahneman , German doctor and chemist, founder of Homeopathy started to set the prinicples of Law of similars in his book Organon of Medicine but it has been around for over 5000years as the principle of treatment in Ayurveda.
On the contrary, Allopathic (conventional medicine), means ‘different from the suffering’, so the drugs that are developed work against the disease and its symptoms. Thus, anti-biotics, anti-depressants, anti-inflammatory, etc.
It is highly individualized approach to healing. There is no one remedy for everyone for a particular condition. The remedy is chosen depending on all the symptoms and peculiar characteristic of that person.