The Unani or Greek system of medicine is believed to have been introduced by Hippocrates which was later extensively developed by Arab doctors. The main theory of the Unani medicine is based on the concept that perfect balance between the elements (arkhan), humours (akhlat) and temperament (mizaj) is necessary for good health. Every individual has inherent powers of self-preservation, called quwat-e-modabira.

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Unani medicine in India has brought about a noteworthy transformation of the medical science in the country