Genomics and knowledge of human genetics is already having some influence on medicine,
as the causative genes of most monogenic genetic disorders have now been identified,
and the development of techniques in molecular biology and genetics are influencing
medical practice and decision-making.
Pharmacology has developed from herbalism and many drugs are still derived from plants
(atropine, ephedrine, warfarin, aspirin, digoxin, vinca alkaloids, taxol, hyoscine, etc).
The modern era began with Robert Koch's discoveries around 1880 of the transmission of
disease by bacteria, and then the discovery of antibiotics shortly thereafter around 1900.
The first of these was arsphenamine / Salvarsan discovered by Paul Ehrlich in 1908 after he
observed that bacteria took up toxic dyes that human cells did not. The first major class
of antibiotics was the sulfa drugs, derived by French chemists originally from azo dyes.
Throughout the twentieth century, major advances in the treatment of infectious diseases
were observable in (Western) societies. The medical establishment is now developing drugs
targeted towards one particular disease process. Thus drugs are being developed to minimize
the side effects of prescribed drugs, to treat cancer, geriatric problems, long-term problems
(such as high cholesterol), chronic diseases such as type 2 diabetes, lifestyle and
degenerative diseases such as arthritis and Alzheimer's disease.