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Homoeopathy is 2nd largest system of medicine and rapidly grownup alternative system of medicine based on similia similibus curentur which is introduced by Dr. Hahnemann-1796. The base and concrete block which help to construct homoeopathic system of medicine is drug proving or HPT-Homoeopathic pathogenetic trial. So, all homoeopaths’ needs to know detail about drug proving. thus, I considered in my study history(Drug proving during hahnemanninan time), Drug proving by CCRH, protocol, methodology of drug proving which help us to understand and differentiate the drug proving Hahnemannian time and present time .