The term "allopathy" was invented by German physician Samuel Hahnemann (1755-1843). He conjoined allos "opposite" and pathos "suffering" as a referent to harsh medical practices of his era which included bleeding, purging, vomiting and the administration of highly toxic drugs. For instance, fever (hot) was believed due to excess blood because patients were flush; therefore, balance was sought by blood-letting in order to "cool" the patient. Hahnemann sought to replace allopathy with his "law of similia" that treated "like with like," a prescientific idea that he had discovered from reading ancient sources. Most modern science-based medical treatments (antibiotics, vaccines, and chemotherapeutics, for example) do not fit Samuel Hahnemann's definition of allopathy, as they seek to prevent illness, or remove the cause of an illness by acting on the cause of disease.

Modern medicine relies on theory that a loss in balance of homeostasis in the life of a cell produces disease and not only that but a complete mental and social well being also is necessary to remain healthy.

It Includes use of modern day drugs (purified extracts from plants or bacteria or synthesized) that have been thoroughly researched, tested, side effects known and continue to be under supervision during future use. Includes surgical fields including advanced and sophisticated surgical practices.

Allopathy is a branch of medicine that has developed tremendously in the past years because of the successful cure rates. It is one of the most accepted medicine in modern times because of its,symptomatic and spontaneous mode of action. It gives relief and results in shorter period of time. Patients suffering from extreme painful conditions,chronic conditions prefer allopathy for its rapid relief. However due to some side effects of some drugs allopathy is switching towards the natural ingredients and lesser synthetic usage.